1911] Study of Muscoid Flies 149 



Sirostomine series — This will include Sirostoma and its 

 allies, which are white-grub parasites. The females deposit 

 their maggots at the surface of the soil, into which the latter 

 penetrate in search of hosts. Phorostoma probably comes here. 



Sardioceratine series — Sardiocera and allies. Theresia and 

 Eutheresia gen. nov. for Coquillett's Theresia analis, probably 

 come here. All are parasites of wood-boring grubs of Coleop- 

 tera. The host relations of Eutheresia are most interesting, 

 and will be detailed elsewhere. The maggots of Sardiocera 

 (which I determine as Coquillett's Theresia tandrec) and 

 Eutheresia both have a pair of short anal processes carrying the 

 tracheas with the anal stigmata at their ends. 



Prosenine series — For Prosena, Myiocera and allies. 



Echinodexiine series — For Echinodexia and allies. Prob- 

 ably Hystrichodexia, Eudexia, Hystrisiphona, and Bathydexia 

 come here. These forms are distinguished in the fly by having 

 spine-like macrochaetae on scutellum and abdomen, and would 

 thus seem to form a natural group by themselves. This char- 

 acter probably does not carry with it the leaf-larviposition 

 habit, although the flies bear a strong superficial resemblance 

 to the Hystriciine and allied forms. It will be noted that spine- 

 like macrochaetae occur in the Blepharipezine series of the leaf- 

 ovipositing minute-egg forms; also that this character does not 

 extend to all the leaf-larvipositing forms. 



Myiophasiine series — The females of Ennyomma globosa, 

 parasitic in Chalcodermus aeneus in cowpea pods, probably 

 deposit the living maggots at the weevil punctures of a certain 

 age, and the very slender maggot bores in next the periphery 

 of the hardened-sap pellicle which closes the puncture until it 

 reaches the semiliquid frass, through which it can easily gain 

 access to the host grub. 



Phasiopterygine series — The peruvian species mentioned 

 above, TD 4005, is Phasiopteryx australis sp. nov. It has been 

 dissected and drawn. The uterus is about sixty millimeters in 

 length, from one-sixth to one-half millimeter in width, and is 

 perhaps the extreme development for relative length and slen- 

 derness in the superfamily, though Phasiotacta is a close second. 

 On page 78, T. A. E. S., XIII (March, 1895), I mentioned two 

 specimens of a fly from Doctor Forbes, Ills., as doubtfully refer- 

 able to Ormia, one of which was reared from Crambus sp. If 

 these specimens belong to the Oestrophasiine series, as is quite 



