1911] Study of Muscoid Flies 131 



13. Tachinine series — Tricholyga sp. (Peru) dissected and 

 drawn, TD 3971. Tachina spp. (Europe, America and Ja- 

 pan) dissected. No uterus, uterovagina normal and capable 

 of holding but few eggs at a time ; eggs oval and flattened, pro- 

 vided with a terminal dorsal hinged lid or cap for exit of maggot, 

 normally deposited in a comparatively undeveloped state of 

 embryo on host. Tubular glands very long and highly func- 

 tional. Chorion hard, opaque, not reticulate. Tachina, Tri- 

 cholyga and allies. Everything here points to egg deposition, 

 and it is thus difficult to understand Dr. I. C. Nielson's record 

 of larviposition for his Tachina larvarum, female flies of which 

 appear to be the same as the ordinary form from which we secured 

 deposition of great numbers of eggs but never a maggot, at the 

 Gipsy Moth Parasite Laboratory. 



14. Meigeniine series — Eumyothyria sp. (Peru) dissected 

 and drawn, TD 3981. Uterus in a single coil, tubular and 

 thickened when full of eggs; egg oval and flattened like that 

 of Tachina, maggot developing within egg in uterus certainly 

 to some extent, but egg evidently deposited on host after a cer- 

 tain period of uterine incubation. The flat eggs exhibit a 

 shingled arrangement in the uterus. The long well developed 

 tubular glands show that the eggs are intended for deposition 

 as such, before the escape of the maggot. Both tubular glands 

 and eggs are practically same as in the Tachinine series. Eumy- 

 othyria and quite certainly Meigenia and allies. TD 651 

 (Florida) with small brown flat eggs, which were certainly 

 uterine, and TD 738 (Ocean Beach, So. Florida), with Plagia- 

 like venation and small flat uterine eggs may possibly come here. 



15th series — Apparently what Coquillett determines as 

 Sturmia distincta, which seems same as protoparcis Towns, 

 and is probably referable to Zygobothria (Florida), TD 619; 

 and other spp. (Europe and Florida) dissected. Short coiled 

 strap-like uterus full of maggots and eggs on end, after style 

 of Hystriciine series (which follows) but in only two or three 

 coils and with white maggots which are evidently deposited on 

 hosts, being without anal membraneous pad for leaf-attachment. 

 Zygobothria and allies, provided Z. bimaculata Htg. of Europe, 

 the type of the genus, agrees herein as it seems to in external 

 characters. Type specimens of many genera will have to be 

 dissected before we will know what name to give this series. 



