1913] Melander — A Synopsis of the Sapromyzidae 63 



11. Antenna! arista bare or microscopically pubescent; wings nearly hyaline 12 



Antennal arista moderately or long plumose, or with dense pubescence; front 



not yellow, except sometimes a spot on lunule; wings yellowish 16 



12. Front not \'ittate; insect entirely black, except halteres and wings. Cal.* 



Caliope nigerrima sp. nov. 



Front vittate with reddish 13 



13. Head largely yellow or red 14 



Head black, the front anteriorly and the face in part yellowish 15 



14. Very robust, cheeks broad; head reddish except for an occipital fascia, three 



frontal vittsB, the middle one triangular, and six facial spots; scutellum and 

 base of abdomen reddish; legs reddish, femora in part black; thorax polli- 

 nose; third antennal joint elongate; 3 dorsocentrals, 2 sternopleurals; scutel- 



lars strongly diverging. Tex.; Miss. Aldrich Minettia eucephala Loew. 



Head yellow, the ocellar region and short lateral vittse black; third antennal 

 joint ovate; legs blackish, the knees and end of tibiae tipped with yellow; 

 thorax shining. D. C Caliope flaviceps Loew. 



15. Third antennal joint less than twice as long as wide; legs yellow except base of 



femora; 4 dorsocentrals. Tex.*, Ariz Caliope variceps Coquillett. 



Third antennal joint over three times as long as wide; legs black, the knees and 

 posterior tibiae and tarsi yellow; 3 dorsocentrals. Ariz., N. M. 

 Caliope longicomis Coquillett. 



16. Scutellum flat and velvety black; legs whitish, the femora black 17 



Scutellum convex and not velvety 18 



17. Scutellum entirely velutinous; center of front shining, laterally with a bisected 



dead-black spot. Tex.*; Kans. Aldrich Caliope signatifrons Coquillett. 



Scutellum subshining at base; front opaque black above the antennae, laterally 

 shining; arista very long-plumose. Mass., Pa.*, N. J. (Fig. 12.) 

 Caliope gracilipes Loew. 



18. Front tibiae largely blackish 19 



Front legs including coxae yellow; arista short-plumose, white, the base yellow- 

 ish; face strongly gibbous. Cal.* Lauxania albiseta Coquillett. 



19. Thorax and scutellum white pruinose; front tibiae and tarsi black, contrasting 



with remainder of legs; arista densely white-pilose. Ariz., Cal. 



Latixania nigrimanus Coquillet. 



Thorax and scutellum shining, not or scarcely pruinose; arista dark 20 



20. Thorax with slight metallic tinge; pleurae sometimes more or less brownish 



(compare species of alternate also) 21 



Thorax polished black, but scarcely metallic 22 



21. Thorax caeruleous, becoming reddish in back and on sides; pleurae brownish; 



femora and tibiae brownish, base of tarsi whitish. Mex., S. Am. 



Caliope? flavipennis Fabricius, Wiedemann, 



Thorax chalybeous, pleurae sometimes brownish in part; legs black, the tibiae 

 and tarsi yellow; 2 dorsocentrals, acrostichals numerous; third antennal 

 joint oblate-ovate; face moderately convex. S. Am., Mex., W. Ind., Ala., 

 La.*, N. J.; Orizaba, Aldrich Caliope muscaria Loew. 



22. Face in profile incised at middle, bulbous only beneath antennae; arista pilose. 23 

 Face large, bare, smooth, evenly convex from side to side and from antennae 



