8 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 68 



moderately large; in repose protruding but slightly from tip of 

 abdomen; inner forceps divergent from near their base; posterior 

 claspers bearing bristles; penis with a more or less rigid, noncollapsi- 

 ble, heavily chitinizcd hood; genitalia of female consisting of a rela- 

 tively unspecialized larvipositor, telescoped within abdomen in repose. 

 Wino-s lacking costal spine; veins without bristles save a few at base 

 of third vein; apical cell narrowly open, ending far before extreme 

 wing tip; section of fourth vein beyond the bend strongly arcuate; 

 last section of fifth vein much less than half the preceding section. 

 Pulvilli of male nearly or quite as long, of female much shorter than 

 last tarsal joint. 



Townsend ^ dissected one species of the genus and found that it 

 possessed the typical double-pouched uterus of Miltogramminae. 

 The writer has dissected dried specimens of Jloridensis, finding in 

 them considerable nimibers of maggots, indicating that the females 

 deposit active larvae. Not all the larvae found were fully formed, 

 a definite series from partly to fully developed first instar maggots 

 being present. 



Thompson's description and figures of signatus ^ indicates that in 

 the first instar larvae, the cuticle covering, save near the mouth, 

 takes the form of oval or polygonal, convex rugosities differing from 

 the covering of flattened scales followed by longitudinal ribs found 

 in Miltogramma and Senotainia. The buccopharyngeal apparatus 

 of signatus, as figured by Thompson, closely resembles that of Seno- 

 tainia, excepting that the whole mechanism is more massive and the 

 median hook lacks the ventral denticle. I find that the buccopharyn- 

 geal apparatus of Jloridensis differs slightly from Thompson's figure 

 for signatus in possessing a more slender intermediate piece and 

 differently shaped lateral hooks. Thompson finds that the buccal 

 armature of the third instar very closely resembles that of Sphecapata 

 conica and Miltogramma punctatum; that there are seven radiating 

 papillae on the anterior spiracle, and that the posterior spiracle 

 possesses the usual three oval slits. 



The puparium oi jloridensis has been carefully described and fig- 

 ured by Greene," who finds that the posterior end bears a small, 

 deep pit, within which occur the posterior spiracles. The three 

 slits of the spiracle are straight and parallel, pointed at the lower 

 end, below which is the large round button. The pit is located 

 largely below the horizontal bisecting plane, the anal opening being 

 outside of and below the pit. Thompson noted that the puparium 

 of signatus lacks the anal pit, an unexpected aberration verified by 

 the writer in North American specimens in the National Museum. 



* An. Ent. Soc. Amer., vol. 4, p. 130, 1911. 



' Rechorches sur les Dipteres parasites, p. 112, 1921. 



« Proc. U. S. Nat. Mus., vol. CO, p. 12, fig. 8, 1921. 



