INSECUTOR INSCITI.?! MENSTRUUS 187 



is not known from Cuba. Can the West Indian hurricanes 

 have anything to do with this distribution? I'n an ordinary 

 storm, mosquitoes seek shelter and do not rise ; but a hurricane 

 may conceivably carry them away, shelter and all. Now, the 

 general track of these hurricanes, as shown by Dr. Fassig, is in 

 a curved line convex to the Florida peninsula. The storms 

 passing over Santo Domingo commonly pass next over the 

 Bahamas, while those passing over Cuba generally strike 

 southern Florida. I do not know whether mosquitoes are ever 

 actually transported by these storms. While the wind is very 

 violent, the rate of progress of the storm is comparatively slow, 

 10 to 12 miles an hour, according to Fassig. Moreover, we 

 know too little about the actual distribution of the species. 

 Collecting in the West Indies has been of the most fragmentary 

 sort. 



THE LARVA OF AEDES IDAHOENSIS 



(Diptera, Culicidce) 

 By HARRISON G. DYAR 



In Insecutor Inscitise Menstruus (v. 120, 1917) I described 

 an unknown Acdes larva from Montana. Recently Prof. J. R. 

 Parker sent me seven bred adults with larval skins, the larvae 

 found in a roadside pool, June 28, 1916. The adults are five 

 females and two males. Three females are idahoensis with 

 basal white abdominal bands ; one female has in addition scat- 

 tering white scales down the middle of the abdomen, rather 

 distinct at the tips of the segments, and the remaining female 

 has a broad suffused dorsal stripe, predominant posteriorly. 

 The larvse are all alike, having the following characters : 



Head hairs single ; skin conspicuously spicular-pilose ; comb 

 of the eighth segment with 14 scales, each with central thorn 

 about as long as the body of the scale ; air-tube short, the 

 pecten of 19-21 teeth, the last two or three detached, followed 

 by the hair-tuft ; anal segment not ringed by the plate, the 

 hairs running basally along the ventral line. 



