132 INSECUTOR INSCITI^ MENSTRUUS 



This may be the male of W. hapla Dyar & Knab, but the 

 white mark on the under side of the mid tarsi is on a different 

 joint. The difference may be sexual, but this remains to be 

 proved. 



Wyeomyia adelpha Dyar & Knab (PI. V, fig. 8). 



Wyeomyia adelpha Dyar & Knab, Proc. Biol. Soc. Wash., xix, 

 140, 1906. 



Described from captured females from Esparta and Zent, 

 Costa Rica. Males are before me from Estrella or Orosi, 

 Costa Rica (C. Picado), which, though in bad condition, are 

 certainly referable here. They were bred by Sefior Picado, 

 probably from Bromeliacese, and killed too soon after emer- 

 gence. 



Genitalia. Side pieces three times as long as wide, conically 

 tapered at apex, the three hairs inserted close together near 

 base of side piece. Clasp with long slender uniform stem ; 

 apical expansion narrowly elliptical, the tip shortly pointed, 

 a broad pilose core reaching nearly to tip ; two rows of setse, 

 one coarse and widely set, the other small and closely set ; long 

 lateral arm rather narrow, with a spine before tip ; short lateral 

 arm infolded, curved. Harpes slender, long, normal, toothed 

 at tip; unci small, pointed. Basal appendages small, with one 

 or two stout spines. 



Wyeomyia ablabes Dyar & Knab. 



Wyeomyia ablab'es Dyar & Knab, Proc. U. S. Nat. Mus., xxxv, 



66, 1908. 

 Wyeomyia ablabes Howard, Dyar & Knab, Mosq. No. & Cent. 



Am. & W. I., ii, plate 4, fig. 21, 1912. 



The larvae occur in Bromeliaceas in southern Mexico, as 

 fully described in the monograph. The species is probably not 

 dififerent from adelpha. I have not the larvae for comparison. 

 The genitalia are alike. The colorational dififerences given of 

 ablabes having a white tip to the prothoracic lobes and adelpha 

 not, may be due to the condition of the specimens, the former 

 being bred and fresh, the latter captured. 



