72 [March 1914. 



or nearly so, with conspicuous snow-white apical fringes on the 2nd, 

 3rd, and 4th ventral segments. (Apical impressions of 2nd and 3rd 

 segments very deep) nana, Kirby ( = schenckella, Perez.) . 



3 (2) Apical impressions of the 2nd and 3rd segments with at most very 



fine rugulosity, sometimes hardly visible, so that, at least in some 

 aspects, the surface is shining or polished and the scattered punc- 

 tures on this part are extremely fine and minute, or may be 

 absent ; mesonotal punctures remote or irregular ; abdomen beneath 

 distinctly shining, with long fine hairs forming apical fringes, but 

 net fasciate with snow-white conspicuous ones ...alfkenella, sp. n. 

 (Stigma very pale). 



4 (1) 1st and 2nd abdominal not both shining, but the first at least 



(excepting its extreme apex sometimes) is dull with surface sculp- 

 ture ; puncturation of abdomen, when present, generally shallow 

 and feebly impressed. 



5 (6) Apical impressions of the 2nd and 3rd segments very densely sculp- 



tured, appearing densely minutely punctate or granulate, and 

 extremely dull ; the basal segment also with the same dense apical 

 sculpture ; this sculpture appears even more dense than that of the 

 general surface of the segments ; 4th abdominal segment with a 

 rather dense apical white hair-band, entire, or at least not much 

 interrupted in the middle. (Stigma very pale ; clypeus with white 



hairs) spreta, Perez. ( = niveata, E. Saund. 



nee Friese). 



6 (5) Apical impressions of the 2nd and 3rd segments both much smoother 



than the general surface, usually distinctly shining in some aspects, 

 never with sculpture like spreta, but at most finely rugulose ; 4th 

 segment with at most a very thin fringe of hairs often inconspicuous 

 and not always white. 



7 (8) Face clothed entirely with pale hairs, the clypeus with long white ones ; 



4th antennal joint never excessively short,* generally appearing 

 in a front view of the antenna? (or from beneath) about as long as 

 wide ; 4th abdominal segment with a regular row of white hairs, 

 springing from the base of the apical impression and extending back 

 about to the apex of this ; mesonotum with fine remote punctures, 

 the surface rugulose or granular-like between these. (Stigma pale 

 whether seen from the upper or under surface of the wing) . . . 



saundersella, n.n. 

 = nana, E. Saund. nee Kirby. 



8 (7) Face in some species clothed either nearly wholly or else at the sides 



with black or sooty hairs; if the face is clothed with pale hairs, 

 either the 4th joint of the antenna is very sh rt, and transverse, or 

 the mesonotal punctures are not as above or the stigma not pale. 



9 (14) Face not clothed to a considerable extent with black or sooty hairs, 



but with brown, ochreous, or whitish ones. 



