12 INSECUTOR INSCITl/E MENSTRUUS 



answered by an exhaustive comparative study of the maggot and espe- 

 cially the cephalopharyngeal skeleton characters in all these flies and their 

 near relatives. It would seem that, if any of the tubular uterus forms axe 

 to be referred to the Hystrididae, the latter family should include all 

 colored maggot forms in which the integumental platelets are present. 

 Perhaps this will prove the ultimate solution of the matter based on actual 

 relationships. 



Family EXORISTIDAE 



Subfamily PYRRHOSIINAE 



Tribe APHRIINI 



Neaphria, new genus. 



Differs from Rhamphina in facial profile being as long as frontal, eyes 

 \aige, parafacials much narrower, no orbital bristles in male, no discal 

 abdominal macrochaetae, epistoma very prominently produced. Differs 

 from Aphria in second aristal joint being no longer than wide, proboscis 

 greatly elongated, first and third veins bare (only two or three bristles at 

 base of third). Description is from male only. 



Arista is beire, facialia bare, parafacials bare, frontal bristles descending 

 to auristal insertion, eyes bare, cheeks of male about one-fourth eye-height, 

 proboscis setiform and reaching nearly to tip of abdomen ; palpi slender, 

 cylindrical, long, reaching oral margin ; male front averaging width of one 

 eye, parafrontals of male with fine hairs in two rows or so outside frontal 

 row of bristles, strong pair of proclinate divergent ocellar bristles, inner 

 vertical bristles not decussate; second antennal joint slighdy elongate, 

 third about three times as long as second, arista thickened on basal third ; 

 parafacials below about width of parafrontals above, vibrissae well re- 

 moved from oral margin. 



Three stemopleural and three postsutural brisdes; scutellum v^th a 

 long but weak decussate apical padr of brisdes, a longer strong pair next 

 them, a strong pair of decreased length outside latter, juid a weak discal 

 pair. First abdominal segment with no median macrochaetae, second 

 with a median marginal pair, both first and second with lateral marginal, 

 third and fourth with marginal row, all the macrochaetae long and strong. 

 Costal spine atrophied, fourth vein bent roundly at oblique angle ; first 

 posterior cell narrowed, narrowly open or nearly closed a litrie before 

 wingtip, bend of fourth vein well removed from wing mar" ; hind cross- 



