178 iNSEcuTOR insciti^e; menstruus 



lostyrax) alogistus, except that perhaps the scales on the 

 head show less white and are of a darker color. The larvae 

 and male genitalia differ, however. 



Genitalia : These differ from alogistus in having two lateral 

 lobes at the base bearing long wavy hairs, reaching the tip 

 of the side-piece. Besides small normal basal lobes are 

 present. 



Larva : Antennae prominent, a tuft beyond the middle, 

 spinulate. Lateral comb of the eighth segment of about four- 

 teen spines in a regular nearly straight row. Air-tube about 

 three times as long as wide, slightly curved, eight pairs of 

 very long hair-tufts along posterior margin, the length of the 

 tube. Pecten of about nine teeth, placed on basal two-fifths 

 of the tube. 



Larvae in permanent pools, Kabelstation, May, 1919. 



Cotype, No. 22711, U. S. National Museum. 



Aedes arborealis, new species. 



Proboscis uniform. Palpi short in the female, long in the 

 male. Occiput with golden narrow curved scales on a wide 

 median zone and along the eye-margins, a patch of flat white 

 scales on the cheeks becoming more yellowish medianly. 

 Mesonotum clothed with golden brown scales. Three broad 

 lines, one median and two subdorsal, of golden yellow scales 

 run from the anterior margin to the ante-scutellar area. More 

 laterally a golden yellow line starting at the front margin 

 reaches the scutellum. More laterally still is a patch of golden 

 scales near the root of the wing, and a few diffuse patches in 

 front of this. A few golden scales mixed with the brown ones 

 around the ante-scutellar area. Abdomen and legs much like 

 those of Acdes fulvithorax Lutz. Wings with the outstanding 

 scales lanceolate, rounded. Claw formula : Female, 0.0-0.0-0.0 ; 

 male, 1.1-1.1-0.0. Length: Body, 4 mm.; wing, 3 mm. 



Genitalia : They place the species in the Howardina group, 

 where it comes near to fulvithorax Lutz, but the seta adjacent 

 to the terminal seta on the harpago is nearly as long as it, 

 whereas it is much shorter in fulvithorax. 



