REPORT OX MOSQUITOES. 221 



on each side of the apex, and has very Httle variation in form, 

 figure 3 showing the extremes ; the differences being chiefly in 

 the curve at the sides. 



The thorax is wider than long, transversely depressed on the 

 dorsal surface, the lateral hair tufts short and two very small 

 tufts near the anterior margin. 



The abdominal segments are normal, with four or five short 

 hairs to the lateral tuft in the anterior two segments, fewer in 

 the posterior ones. The eighth segment has small lateral patches 

 of from sixteen to twenty-two oval scales, a single scale being 

 shown in figure 9. 



The anal siphon (fig. 7) is one and one-half times as long as 

 broad or slightly less, and is grayish in color. The two rows of 

 spines, from tw^elve to sixteen in each row, extend beyond the 

 middle with a small terminating tuft. The spines are of mod- 

 erate length, becoming short toward the base and are peculiar by 

 being toothed on both sides. The ninth segment is square or 

 broader than long, with the hairs of the double dorsal tuft and 

 ventral brush shorter than normal. It is completely encircled by 

 the chitinized saddle and the gills are very short ; often no longer 

 than broad. 



Habits of the Early Stages. 



These are like those of sollicitans and cantator and with their 

 larvre those of tceniorhynchus also occur. None of our collect- 

 ions show larvae of this species only, though Mr. Viereck's ma- 

 terial approached this point very nearly at one period. As a 

 rule they are in the small minority. In a mass of partly grown 

 larvae there is little apparent difference between the three species, 

 but when full grown the maculate heads of cantator and 

 tcciiiorJixnchus are characteristic, while between these the very 

 short anal siphon distinguishes the latter. 



Practically everything that has been said of the habits of the 

 two other species above mentioned applies to fceniorhynchus as 

 well. As the species is more southern in its range, sollicitans is 

 its companion more frequently than cantator. 



CUIvKX SOUAMIGER, COO. 



The Scaly Winged Mosquito. 



The distinctive characters of this species are the very large 

 size, jet black tarsi, with well defined white bands at the base of 



