iNSECUTOR insciti;e; menstruus 179 



Larva : Antennae slender, uniform, smooth, a single hair 

 beyond the middle. Head-hairs double. Skin smooth. Lat- 

 eral comb of eighth segment a triangular patch. Air-tube 

 stout, twice as long as wide, pecten of eleven teeth not reach- 

 ing the middle of the tube, and followed by a two-haired tuft. 



This species was bred by us from a tree-hole. Dam, January, 

 1919, in the interior. The coloration of the adult is something 

 between that of Acdes fiilvithorax Lutz and Aedes septem- 

 striatus D. & K. 



Cotype, No. 22712, U. S. National Museum. 



Aedes argyrothorax, new species. 



Male. Proboscis uniform. Palpi two-thirds as long as pro- 

 boscis. Occiput with silvery-white flat scales, a black patch 

 on the cheeks, a few upright forked scales behind. Mesonotum 

 with the front half with silvery white scales, the hind margin 

 slightly V-shaped, the point directed forward. Abdomen black 

 above, with silvery, segmental basal, lateral spots. Wings with 

 the scales ligulate. Legs with the femora black and white, 

 tibiae black, tarsi black, but base and tip of first joint and base 

 of second joint white on mid and hind legs. Claw formula: 

 2.1-2.1-0.0. Length : Body, 3.5 mm. ; wing, 2.5 mm. 



Genitalia : They place the species in the Gualteria group 

 near Acdes oswaldi Lutz, thorntoni D. & K., and podograph- 

 iciis D. & K. Side-pieces without lobes. Clasp-filament uni- 

 form. Harpes narrow. Harpagones moderately long, pilose, 

 with a pilose basal quadrangular arm ; filament about as long 

 as stem, broadened beyond the base, gradually narrowing and 

 curved toward tip. Unci moderate. 



We have two males, one of which was captured near a tree- 

 hole on an estate near Paramaribo. 



Cotype, No. 22713, U. S. National Museum, 



Megarhinus aldrichanus, new species. 



Female. Proboscis curved, palpi two-thirds of its length, 

 terminal joint minute, blunt. Occiput with flat bright, bluish- 

 green scales, whitish at sides. Mesonotum with dark bronzy 

 brown scales, more greenish blue in front and at the sides ; no 



