96 INSECUTOR INSCITI^ MENSTRUUS 



stout Spine and two or three stout setae, confused with the 

 vestiture. 



In (Micraedes) hisulcatus Coq. from the Antilles — Mar- 

 tinique, Porto Rico, Cuba (the Santo Domingo type has dis- 

 appeared from the collection) — the male palpi are a little 

 shorter, being only a little over one-third the length of the 

 proboscis. The clasper is simple, slender and long. The inner 

 division of the lobe of the side-piece has the two filaments 

 shortened and thick, the outer on a rather long pedicel, the 

 inner sessile at the base of this. Outer division very short, 

 bearing the five setae at different angles from large tubercles, 

 one of them stout and long. This genitalic structure is essen- 

 tially as in re strict or, or even less developed in the direction of 

 latisquama, though the adult male palpi have degenerated. 



In the remaining three species, the male palpi are very short, 

 as short as those of the female. {Micraedes) corrigani has 

 the clasper smooth, curved and rather short. The inner di- 

 vision of lobe of side-piece columnar, short and thick, the two 

 rods inserted nearly together from the summit. Outer division 

 short, the six setae radiating from the crown, about alike. The 

 species occurs in Panama. 



The last two species have the clasper angularly curved and 

 beset with small spines on the outer terminal aspect, though 

 not thickened. (Isostomyia) conservator D. & K., from Trini- 

 dad and Surinam, has the outer division of the lobe of side- 

 piece short and stout with six radiating spines, two long and 

 stout, one shorter, and two small and slender. In (Isostomyia) 

 bifoliata Dyar, from Panama, this part is lengthened and bears 

 two leaves, as described above. 



Culex (Choeroporpa) iolambdis Dyar. 



Mr. J. B. Shropshire fortunately discovered a second male 

 of this species, bred from larvae in surface-water at Gold Hill, 

 Canal Zone, Panama, December 31, 1921. The characters 

 rested heretofore only on the single male type, which is entirely 

 confirmed by this second specimen. 



