112 INSECUTOR INSCITI.^ MENSTRUUS 



A NOTE ON THE AMERICAN SPECIES OF 

 MANSONIA 



(Diptera, Culicida) 

 By HARRISON G. DYAR 



In discussing this genus in the monograph/ we lacked males 

 of many of the species treated. We also received too late for 

 insertion data on the oviposition of M. titillans Walk. This 

 latter has been discussed by the writer and Mr. Knab in this 

 journal (Ins. Ins. Mens., iv, 61, 1916). Most of the missing 

 males have now come to hand and the genitalic table may be 

 recast as follows: 



Clasp-filament branched; process from the angle of excavation of side 

 piece long, swollen at tip, with a short inserted rod. 



titillans Walker, flaveolus Coquillett 

 Clasp-filament simple ; process short, at least shorter than the rod, not 

 swollen at tip. 



Rod and process both long, exceeding end of side-piece. 



coticula Dyar & Knab 

 Process distinctly short ; tip of rod not reaching end of side-piece. 

 Unci swollen at tip, with two outward and one retrose teeth. 



fasciolatus Arribalzaga 

 Unci finely toothed at tip with double dentate inner membrane. 



perturbans Walker 

 Unci simple, membranous nigricans Coquillett 



Subgenus MANSONIA Blanchard 



Eggs deposited attached to the under side of floating leaves. 



Mansonia titillans Walker. 



Howard, Dyar & Knab, Monog., iii, 516, 1915. 

 Dyar & Knab, Ins. Ins. Mens., iv, 61, 1916. 



M. flaveolus Coq. is doubtless but a variation of titillans. 

 The male genitalia do not differ and the single male type has 

 now been matched by a female from Panama, the male being 

 from the Island of St. Thomas. These localities are widely 

 separated, showing that flaTeolus occurs as a rare aberration of 

 titillans throughout its range. 



Howard. Dynr & Knab, Mosq. N. & Cent. .\m. & W. I., iii. .'i04, 1S15. 



