INSECUTOR INSCITI.^ MENSTRUUS 53 



characters above are drawn from this species. TD1415, 

 female; TD1417, male. 



Cnephalomyia Townsend. 



Ann. Ent. Soc. Amer. IV, 1,32, 144-145 (Jmie, 1911). 

 Jn. N. Y. Ent. Soc. XX, 113-114 (June, 1912). 



Genotype, Cnephalomyia floridona Townsend, 1. c. 



Differs from Cnephalia (genotype bitccphala Meigen) and 

 Spallanzania (genotype hebes Fallen) as follows: Three rows 

 of frontal bristles on each side in both sexes. Parafacials with 

 bristles in two regular rows. Facial plate much wider than 

 parafacials in both sexes, about twice as wide and same pro- 

 portions in male and female. Third antennal joint of male 

 about two and one-half or nearly three times second, that of 

 female one and one-half to one and three-fourths times second. 

 Second aristal joint varies but is always much longer than 

 wide. Arista subgeniculate to geniculate. Facialia thickly 

 ciliate to point above middle in male, thinly ciliate to point 

 short of middle in female. Parafrontals and parafacials of 

 practically same form in both sexes, the parafacials evenly 

 narrowing below in conspicuous manner. Abdomen rounded 

 subconical in both sexes, slightly flattened in male. From 

 Cnephalia it differs further in having no median marginal 

 macrochgetse on first segment even in male. From S pallansania 

 it dift'ers further in facial plate being blackish in ground color. 

 The hind tibiae are quite evenly ciliate, with only one longer 

 bristle below middle, thus differing from both the above genera. 

 Face fully as long as front in male, slightly shorter than front 

 in female. 



Differs from Acroglossa (genotype hesperidariim Will.) 

 only in front and face being proportionately slightly narrower, 

 the eyes distinctly larger as compared with rest of head ; bristles 

 of parafrontals and parafacials a little stronger and more 

 thickly placed; facial plate about same width but parafacials 

 slightly narrower; and in the very contrasted tgg and first- 

 stage maggot. The genus appears not to enter the geographi- 

 cal range of Acroglossa. 



