CERATOMYIELLA AND PARADIDYMA EEINHARD H 



posthumeral, 1; presutural, 1; dorsocentral, 2, 3; notopleural, 2; 

 intraaiar, 2; supraaiar, 3; postalar, 2; hypopleural, 3 or 4; ptero- 

 pleural, 1 (small); sternopleural, 1, 1; scutellum with two laterals 

 besides one smaller decussate apical pair. Postscutellum normally 

 developed. Infrasquamal hairs absent. 



Abdomen rather narrow and slightly elongate, without discal 

 bristles. 



Legs long and slender ; fore tarsi in female compressed and swollen, 

 the basal segment nearly as long as tibia, claws and pulvilli minute ; 

 in male the fore tarsi normal with short but distinct claws and 

 pulvilli. 



Wings normal in shape; veins bare except the third, which is 

 setulose almost to small cross vein; last section of fifth vein short; 

 apical cell closed with a short petiole reaching costa shortly before 

 wing tip ; costal spine developed. 



KETT TO SPECIES OF CEBATOMYIEXLA 



1. Apical cell closed and usually petiolate 3. 



Apical cell open 2. 



2. Male with orbitals ; epaulets black ; last three abdominal seg- 



ments largely gray pollinose, the narrow hind margins snb- 



shining, male only (New Jersey) (5) orbitalis, new species. 



Male without orbitals; epaulets red; last three abdominal seg- 

 ments shining black on apical half; third antennal segment 

 in female very slender (Florida) (4) angusticomis (Townsend). 



3. Legs black 4. 



Femora reddish yellow (United States, widespread) (1) conica Towusend. 



4. Parafacial bristles reduced to small hairs in upper half of 



row; fourth abdominal segment polished black, usually with- 

 out pollen ; petiole of apical cell shorter than small cross 



vein (Texas, New Mexico, Arizona) (3) bicincta, new species. 



Parafacial bristles not noticeably reduced in size above; fourth 

 abdominal segment thinly pollinose on basal third; petiole of 

 apical cell about one-third the length of apical cross vein, 

 male only (West Indies) (2) townsendi (Williston). 



(1) CERATOMYIELLA CONICA Townsend 



Ceratomyiella conica Townsend, Trans. Amer. Ent. Soc, vol. 18, p. 380, 1891. 



Male. — Front at vertex 0.3 and 0.31 of the head width (two speci- 

 mens), gradually widening to antennae; median stripe reddish 

 brown, hardly more than half the paraf rontal width on entire length ; 

 paraf rontals black and subshining, viewed from the side thinly polli- 

 nose; face and parafrontals thinly gray pollinose; antennae reddish 

 black, third segment broader than parafacial, six or seven times 

 longer than second; arista brown, thickened about to middle; palpi 



