176 



Nervulus nearly its own length beyond the basal; the recurrent 

 joining the second cubital cell, the latter therefore five-sided; radius 

 originating beyond the middle of the broadly oblanceolate stigma, its 

 abscissae angulate on each other, the second more than twice as long as 

 the first, shorter than the first transverse cubitus, radial cell barely fall- 

 ing short of the extreme apex of the wing; second cu. cell not noticably 

 narrowed apically. the second transverse cubitus distinctly indicated but 

 obsolescent ; subdiscoidal nervure interstitial ; hind wings with a post 

 ncrvcllus (as Gahan uses the term), the submedian cell more than one- 

 third and less than half the length of the median. 



Abdomen fusiform, nearly three times as long as broad, first tergite 

 less than twice as long as broad at apex, longitudinally sulcate with 

 carinate margins, a median area indicated on the basal two-thirds by 

 strong longitudinal carinae ; the median area has some irregular trans- 

 verse carinae basally and a median longitudinal one subapically to which 

 some oblique carinae converge, remainder of abdomen smooth ; sulcus of 

 first suture fine narrowed in the middle but scarcely interrupted ; fused 

 second and third tergites with the suture scarcely indicated, longer than 

 broad, nearly half the length of the abdomen ; ovipositor nearly as long 

 as the head, thorax and abdomen together. 



Described from 34 5 collected at Fish Hoek, Simon's 

 Bar, near Cape Town, npon cow droppings or bred from the 

 pnparia, of Musca Jusoria, breeding in cow dung there, April, 

 1914 (Bridwell). ]^o males were seen or bred. 



The eggs of Mnsca lusoria are deposited scattered on the 

 surface of fresh cow droppings and hatch within a few hours ; 

 the larvae reach full gro^vth in about five days arid enter the 

 earth to pupate. The eggs of Alysia hisoriae are deposited in 

 the larvae apparently on the second day and the adults emerge 

 from the puparia. 



In Ashmead's tables* this species might be considered to 

 run to Asyntadus ]\Iarshall, but in that genus the second ter- 

 gite is punctured and opaque. Hovv^ever, if we consider the 

 second transverse cubitus as distinct, and it is distinctly in- 

 dicated though obsolescent, it would run to Goniarcha Foerster. 

 The type species of this Foersterian genus is Alysia lucicola 

 Haliday, from which this species differs, aside from color, in 

 the much longer ovipositor, the subdiscoidal nervure being in- 

 terstitial, and in the shorter first tergite. 



Proc. U. S. Nat. Mus. 23:104, igoo. 



