174 PROCEEDINGS ENTOMOLOGICAL SOCIETY 



in the leaves of an arboreal Bromelia in which the larvae of 

 Anopheles crusii were also found (A. H. Jennings). 



The speceis is allied to W. celaenocephala D. & K. and /['. 

 hapla D. & K., but differs in the coloration of the tarsi. The 

 female presumably has the tarsi marked as in the male. 



Aedes thibaulti, new species. 



Male and Female. Proboscis moderate, clothed with black scales ; 

 palpi short in the female, longer than the proboscis in the male, black- 

 scaled; claws of the tarsi toothed; legs black, the femora white beneath 

 at the base, the tips narrowly white ; abdomen black-scaled above, with 

 lateral triangular basal segmental white marks, but without dorsal 

 banding, except narrowly in the male; mesonotum clothed with black 

 scales on the disk, the sides with golden yellow scales, broadly on the 

 frontal half, narrowly behind, forming a conspicuous angulation of 

 the median dark band; occiput clothed with black and yellow scales 

 intermixed, the dark scales forming a sublateral patch on either side. 



In the male genitalia the side pieces are long and slender, with 

 both subapical and subbasal lobes, the latter bearing setae but without 

 a large distinct spine ; clasp filament slender, with a long terminal spine. 

 Harpes rather small, their margins thickened and revolute, but without 

 the usual terminal teeth. Harpagones with thick columnar stem 

 which bears an apical prolongation clothed with minute pile. The 

 terminal filament thus arises from a short separate limb, not as long 

 as the pilose branch ; the filament is short, broadly rounded with an 

 inner rounded projecting lobe. The unci are unusually distinct, 

 forming a basal cylinder, but not strongly chitinized. Basal append- 

 ages small, rounded, setose. 



Type No. 12746, U. S. National Museum. 



One male and one female, Scott, Arkansas, April 27, 1909 

 (J. K. Thibault, Jr.). 



The species falls in the table with Aedes aurifer Coquillett, 

 but differs in the pattern of coloration of the mesonotum. 

 while the male genitalia are of a very different type. 



