370 UNITED STATES NATIONAL MUSEUM BULLETIN 224 part i 



Not with the above combination of characters. Lateral 19. Proboscis rather strongly and distinctly extended beyond the 



tergal bristles present or absent. Apex of tbird antennal face ; face in the middle seventh of head width. Face very 



segment usually modified ; if unmodified, the wings are slightly visible in profile. Mesonotum and abdomen glassy 



not banded H smooth, not punctate. Incision of third antennal segment 



10. Two submarginal cells Epaphrodittts Hermann situated not far from apex .... Othoniomyia Hermann 



Three submarginal cells . . Eoepaphboditttb, new subgenus Proboscis slightly or not at all extended beyond the face . 20 



11. Third antennal segment attenuate and drawn far out api- 20. Face strongly produced forward throughout both above and 



cally into a fine point with or without a bristly style . 12 below and nearly plane. Face from the frontal aspect 



Third antennal segment, if sharply pointed, narrowed, or wide, in the middle more than one-fourth the head width ; 



attenuate apically, is never drawn out into an attenuate face distinctly divergent from the base below to the ver- 



style. Sometimes blunt or truncate at apex 14 tex ; proboscis slightly extended beyond the face. 



12. Attenuate part of third antennal segment densely short Pbotichisma Hermann 



plumose, without apical bristle ; supraoral bristles long, Face very short except near the epistoma ; face of moderate 



few and weak 13 width or quite narrowed ; sides usually parallel .... 21 



Attenuate part of third antennal segment with only the usual 21. Terminalia, both male and female, completely concealed 



microsetae, an apical bristle present or absent, the dorsal ^ lateral aspect by the cuplike development of the last 



spine with accompanying excision. Supraoral bristles tergite. Abdomen strongly and coarsely punctate; the 



long, stout, more abundant ; end vein of discal and fourth mesonotum and upper pleuron usually with fine punctures, 



posterior cells in approximate alignment. Abdomen never narrowed basally ; shorter and more ro- 



Atbactia Macquart bust flies. The face ranges in width from a fourth to 



13. Fourth posterior cell distinctly shorter than the discal cell : a seventh of the head width. Antenna elongate but not 



third antennal segment blunt, and ends in a minute, hairy attenuate; the spine of the third segment is near or just 



spine Hybozelodes Hermann beyond the middle of the segment, usually with 



Fourth posterior cell as long or longer than the discal cell ; accompanying incision. Front expanded but vertex 



third antennal segment attenuate, and ends in a plumose convergent Atomosia Macquart 



arista Lophoceraea Hermann Terminalia exposed in lateral aspect; rarely punctate, 



14. Third antennal segment long, with blunt, truncate apex. often more slender flies 22 



Front considerably wider than face but vertex narrowed. 22. Face in the middle tenth to fifteenth of total head width ; 



Proboscis quite short, palpus minute. Pleuron, mesono- width of vertex 2 or 3 times the face width ; face also 



turn, and abdomen very coarsely punctulate. ScuteUum wider at epistoma; fourth posterior cell usually a little 



with only a pair of fine, stiff, marginal hairs. Tergal longer than discal cell. Proboscis pointed at apex ; occi- 



bristles quite absent except on first two segments and re- pu t w jth on i y nne se tae ; first antennal segment with a 



placed by silky pile. End of abdomen strongly cupped. long, strong bristle; occiput overgrown by the eye pos- 



Pronotum with a collar of almost spikelike or spinelike terodorsally on the upper fifth of head. The anterior 



bristles, but occipital bristles very weak. branch of the third vein emerges some distance beyond 



Hodites, new genus the end of the discal cell .... Anoplothyrea de Meijere 



Third antennal segment not truncate ; no collar of spines on Faee of norma i w idth for the Atomosini, a sixth of head 



pronotum and otherwise differing from above 15 width or wider 23 



15. Third antennal segment rather blunt at apex and exception- ^ Abdomen not punc tate ; lateral margin "corrugate" or with 



ally long and slender; the first segment short and at most "staircase offset" from segment to segment. Fourth pos- 



1 or 2 times as long as the short second segment ; first pos- terior ceU of near i y the same i en gth as the discal cell. All 



terior cell nan-owed or closed : medial crossvein long, the the femora swoUe n and the ventral bristles of the hind 



end vein of discal and fourth posterior cells not aligned ; femur tuberculate. Lateral tergal bristles long and 



the posterior branch of the third vein ends far back from prominent. Epandrium (ninth tergite) inverted, long 



wing apex; marginal cell wide apically and second sub- oval and bulblike, especially obtusely rounded at base, 



marginal cell strongly arched basally. Tergal, abdominal Gonopod well developed, with the inner processes extend- 



bristles well developed ; scutellar margin with only stiff ing a little beyond and each with a double hook, dorsal and 



hairs Aphestia Schiner ventral at apex. Hypandrial element quite short so that 



Third antennal segment shorter or, if more than 2 times the a me dial trough or cavity is present as in higher 



combined length of the first two segments, the apex is Laphriinae Adelodus Hermann 



slender. The scutellum bears stout bristles 16 Abdomen coarsely punctate and only slightly "corrugate." 



16. The long, third antennal segment is attenuate. Scutellar Fourth posterior cell distinctly shorter than the discal cell 



margin with very long, stout, spinous bristles. Terminalia and never parallel . Hind femora moderately swollen and 



largely concealed but abdomen not cupped 17 the ventrali bristly hairs not tuberculate. Lateral tergal 



If the scutellum bears long, stout bristles, the antenna is bristles quite weak, if present. Fourth posterior cell con- 

 short 1 ^ siderably shorter than discal cell. Epandrium short, 



17. Vertex slightly but distinctly convergent at the top of head, truncate, with semicircular apex. Ninth sternal elements 



and more narrow than front. Scutellum with 2 pairs of V-shaped, with steep sides, not cleft medially and without 



long spinous bristles. Tergites without bristles except differentiated, lateral gonopod or medial, troughlike 



on first tergite Ltcosimyia Hull cavity . inner processes obtuse at apex. 



Vertex divergent above. Scutellum with 1 pair of stout Bromotheres new genus 

 bristles. Tergites with distinct, characteristic bristles. 2 4. Antenna comparatively short, the third segment wide. Spine 



Abdomen rather slender and punctate. Face quite narrow. placed cloge to flpeX) Qr a short distance back from the 



„„ _ . J , , , . , C^MO^A Ke fre sz narrowed apex and without accompanying excision. No 



18. Third antennal segmental spine properly apical, but with a microsegment present. Abdomen and thorax nowhere 



moderately long, bluntly attenuate extension beyond, form- punctate. Face narrow, its sides nearly parallel but the 



ing a cuplike incision in which this spine rests; rather Z ~ .. ». , A v.j „_-„ m „^i „«. 



, ' . „ , . ' _. front and vertex divergent above. Abdomen narrowed at 



large, not punctate, or at most very finely punctate, flies, . . , . , _ ,, 



4.1. j . j, j. , , - t , i . „ . the base, more slender and elonsrate. Generally not punc- 



the end vein of discal and fourth posterior cells in near or L ^ u ' c B «"" cl ""« ci " f « ' * 



complete alignment ; base of second submarginal cell tate flies - Scutellar margin with either bristly hairs or 



strongly arched Cyanonedys Hermann witn l°ng, stout bristles, the rim smooth or impressed. 



Apex of third antennal segment not conspicuously reduced Fourth posterior cell often longer than the discal cell. 



in thickness beyond the spine 19 Exjmecosoma Schiner 





