95 ENTOMOLOGY FOR MEDICAL OFFICERS 



or even as in Myzomyia. The palpi of the female are always 

 very short ; those of the male are almost always longer than 

 the proboscis, but in one or two species (e.g. Dinocerites, a 

 West Indian form) are very short. 



(b) Genera of the ST'EGOMYIA Type. — Though some darts 

 are usually present on the nape, and though a few localised 

 sickles may sometimes be present on the head and scutellum, 

 the predominant — sometimes the only — scales of both these 

 regions are flat squames, which overlap like the slates of the 

 roof and impart a very smooth appearance. The wings are 

 never spotted, and the " lateral " scales are slender and stiff- 

 looking. The palpi as a rule are quite short in the female 

 and are longer than the proboscis in the male, but they may 

 be decidedly shorter than the proboscis in the male {e.g. in 

 Hyleccetomyid), or as much as two-thirds the length of the 

 proboscis in the female {e.g. in Brevirhynchus and some 

 species of Leicesterid), or quite short in both sexes {e.g. in 

 Harpagoniyia). 



(c) Genera of the ^DES Type.- — Like the Stegontyia type, 

 except that the scales of the scutellum are exclusively sickles. 

 The palpi may be quite short in both sexes {e.g. in .^des), 

 or short in the female and long in the male {e.g. in Pseudo- 

 skused), or short in the female and only about two-thirds the 

 length of the proboscis in the male {e.g. in Mimomyid). 



Many of the forms included in this series are jungle 

 mosquitoes, and none of them are known to be of any 

 pathogenic importance. 



(d) Genera of the \3'^K^Q'YM^\K Type. — The predominant 

 — sometimes the only — scales of the head and scutellum are 

 flat overlapping squames. There are often also many 

 broadly-elliptical squames on the scutum. As a rule, some 

 of the wing-scales are broad triangular leaves. The 2nd 

 marginal cell is very small. Palpi quite short in both sexes. 

 Small or minute insects, commonly with beautiful blue mark- 

 ings ; usually found in jungle, and not known to be of any 

 direct importance from the medical standpoint. 



(e) Genera of the PSOROPHORA 7>/^.— The predominant 

 scales of head, scutum, and scutellum are elliptical squames, 

 which are either quite flat or may be curved ; they often do 

 not overlap but have a rather scattered appearance. In 



