1911] Study of Muscoid Flies 133 



ISth series — Species agreeing in external characters with 

 Eumasicera but certainly not that genus (Peru), TD 3987; 

 dissected; probably Exorista futilis O. S., determined in the 

 adult by Mr. W. R. Thompson (Massachusetts), TD 344, 

 361. Uterus short, thick, tubular, in only two or three coils, 

 filled with microscopic oval eggs of same character as those 

 of Masiceratine series except that they show no honeycomb 

 or network reticulation but a concentric-ring or concentric- 

 arc pattern viewed from above, apparently due to a dispo- 

 sition of ridges or wrinkles in the chorion. Eggs deposited 

 on foliage, probably for lepidopterous larvae only. The above 

 mentioned forms must, I think, belong to the same genus as 

 the reticulation of the chorion is of the same character; but until 

 the type species of Exorista, Sturmia, and various other genera 

 are dissected, it will be impossible to say what generic name must 

 be given them ; and still further genera must be dissected before 

 we can know what name to give this series, which may include 

 Phorocera, or even older genera. TD 437, which seems refer- 

 able to Phorocera on external adult characters, probably comes 

 in this series; it is European. 



19th series — Ophirosturmia cincta gen. et sp. nov. (Peru) 

 dissected and drawn, TD 4012. Uterus tubular and elongate 

 in four to six coils, stouter near head, filled with microscopic 

 oval brownish-yellow to yelk>w-brown eggs, whose choria 

 exhibit a honeycomb reticulation, the eggs deposited on leaves 

 in proximity to certain leaf-eating insects. There is no punc- 

 tulation to the chorion. Distinguished from the Masiceratine 

 series by difference in spermathecal ducts, and by the brown- 

 yellow color of the mature eggs, as well as other points. Apical 

 cell ending well before wing-tip. 



There are other series yet to be defined among the leaf-ovi- 

 positing forms. 



20. Gymnochaetine series — Gymnochaeta sp. (Peru) dis- 

 sected, maggot drawn, TD 3973. Maggots and eggs on end in 

 two or three rows in very long subtubular coiled uterus; maggots 

 black by reason of the body segments bearing a large dorsal 

 and two small lateral colored plates, these made up of minute 

 colored scale-like plates of different form from those of the 

 Hystriciine series; the maggot with ventral locomotory spine- 

 pads and spine-rows composed of very microscopic spines and 

 evidently specially fitted for locomotion in the open; no anal 



