ICHNE UMON FLIES— ASHMEA D. 39 



TABLE OK (iKNEKA. 



^^' int,'s al )l )reviated 28 



WingH fully developed 1 



1. Transverse median nervure in hind wings broken distinctly Ix'low tlu^ middle, 



usually /'(/• below the middle 8 



Transverse median nervure in hind wings broken at, near, or somewiiat above 

 the middle, rarely very slightly below the middle 2 



2. Transverse median nervure in front wings originating either l)efore or behind 



the basal nervure, never distinctly interstitial with it 6^ 



Transverse median nervure in front wings interstitial with the basal nervure. 



Metathorax not short 3 



Metathorax short 6 



.'S. Metanotum exareolated, but with two transverse carinas, the ajjical carina some- 

 times obsolete medially, the s-piracles short, oval, or rounded 4 



Metanotum usually with 6 more or less distinct areas above; clypeus with a 

 slight median tooth anteriorly; disco-cubital nervure » of! V)roken by 

 a stumj) of a vein; apex of seventh or eighth dorsal abdominal seg- 

 ment with a white spot; tarsi with the fourth joint cordate, the last 

 very large, as long as the second or longer. 



(246) Aritranis Fbrster^ = Hi/grocrj/piuii Thomson. 

 4. Disco-oul)ital nervure l)r()ken by a stump of a vein. 

 Disco-cubital nervure nut broken by a stump of a vein. 



Al)domen mostly red. not sjiotted with white. (247) ITahrocnjptHf; Thomson. 

 ('ly])eus irifhoiit a median tooth anteriorly but with a transverse farrow or 



impression ; areolet large, the sides parallel 5 



('lypens irith a median tooth or i^rojection anteriorly, the labrum usually pro- 

 jecting as a ledge from beneath; pleural carina? of metathorax want- 

 ing; dorsal abdominal segments 7-8 with a white spot. 



(248) HopIoeri/ptMS Thomson, 

 ft. Antenna' normal; metathorax and sides of the thorax not striate; dorsal abdom- 

 inal segments 7 and S si)otted with white at apex. 



(249) S'piloiryptii>i Thomson (part.). 



Antenna' abnormal, compressed or dilated toward apex; first joint of the fla- 



gellum not longer than the second; metathorax and the sides of 



the thorax striated; abdomen not spotted with white. (Mexico.) 



(Female. ) (See p. 40) (250) Joppoceras Ashmead, new genus. 



(Type, Cryptus dubiosum Cresson Ashmead, manuscript. ) 

 6|. Metathorax usually short, sloping off from its base, or obliquely truncate, but 

 with two transverse carinse; abdominal petiole normal, more or 

 less broadened and bent or elbowed at apex; clypeus anteriorly 

 truncate or slightly arcuate, ])utvnthout amedian tooth; disi-o-cubital 

 nervure most frecjuently In-oken by a stump of a vein; abdomen red 

 or red with ])la('k at apex, without white spots; submedian cell a 

 little shorter than the median, rarely equal; metathoracic spiracles 



elongate ( 251 ) Tnjchoai.'i Forster. 



Metathorax not short. 



Petiole of abdomen elongate, slender, not or only slightly thicker at apex 

 than at base, as seen from the side straight or nearly, at most gently 



(turved, but never distinctly bent or elbowed 7 



Petiole of abdomen in female thickened and bent or elbowed at ai)ex, 

 slenderer in male; disco-cubital nervure not broken; abdominal 

 segments 7-S with a white spot above; metathoracic spiracles small, 

 oval, the })leural carina' ])resent. 



(249) Spilocryptus Thomson (part.). 



'This genus should be removed to the Tribe Phygadeuonini. 



