78 ENTOMOLOGY FOR MEDICAL OFFICERS 



present on some or all of the segments of the abdomen, and 

 though they seldom form a close investment they often stand 

 out as prominent tufts or broken bands. The wings though 

 decidedly spotted have a dark cast, owing to predominance 

 of blackish scales, and in several of the species there are large 

 black spots on the front edge, the colour of which, though 

 mainly due to scales, is partly due to staining of the wing 

 itself. The wing-scales are broad. 



The species are restricted to South America. 



AnopJieles {Arribalzagid) maculipes, Theobald. Trinidad 

 and Brazil. Genital lobes and last segment of the abdomen 

 thickly covered with broadish scales ; on every other segment 

 of the abdomen, except the first, there are, besides scattered 

 recumbent scales, very regularly arranged tufts, or broken 

 bands, of remarkably broad, erect scales. The wings, though 

 largely dark scaled, are spotted with yellow scales, and all 

 the scales are broad ; at the front edge there are three black 

 blotches — two very large, one small — the colour of which 

 is partly contributed by a staining of the wing itself Palps 

 very shaggy, black, with narrow white bands and white tip. 

 Legs dark brown, much banded and brindled with white and 

 yellow. Three well-defined brown spots on the scutum, the 

 largest of which invades the scutellum. 



Anopheles {Arribalzagid) pseudomaculipes, Chagas, also 

 from Brazil, is probably a variety of the above. It is said to 

 differ in having broader wing-scales and the tarsi more spotted. 



Anopheles {Arribalzagid) mediopunctatus, Theobald 

 ( = Cyclolepidopteron mediopunctatuvi, Theobald), also from 

 Brazil, so closely resembles Arribalzagia maculipes as to 

 raise the suspicion that the two may be seasonal forms of 

 the same species. In the specimens preserved at the British 

 Museum the only differences to be detected are (i) in the 

 palps, which are not, or are very obscurely, banded ; and (2) 

 in some of the scales, both of the abdomen and wings, being 

 broadly foliaceous. 



Anopheles {Arribalzagia) intenncdius, Chagas {= Cyclo- 

 lepidopteron intermedium, Chagas), also from Brazil, is said 

 to differ from mediopunctatus in not having bands on the 

 palps. Possibly all four "species" are local or seasonal 

 forms of one species. 



