REPORT ON MOSQUITOES. 253 



lary palpus (fig. 76, 3) are normal, the latter with a stout basal 

 joint, which is not shown in the drawing. 



The thorax is broader than long, angulated at the sides and 

 with rather small sized tufts arising from the angles. 



The abdominal segments have lateral tufts of hair, four or five 

 in each in the tw^o anterior segments, two each in the succeeding 

 ones, the seventh wnth short tufts only. The eighth segment has 

 lateral patches of scales, about ten or twelve in each, though there 

 may be as many as fifteen, arranged in an irregular double row ; 

 the single scale is rather broad, pointed at the apex and fringed 

 at the sides with fine, short hair. The anal siphon is two and 

 one-half to three times as long as broad at the base and dirty yel- 

 low in color; the lateral rows of spines consist each of from four- 

 teen to eighteen spines extending half the length of the siphon 

 from the base, the terminal two separated from the rest and from 

 each other. The individual spines are usually two or three 

 toothed, but occasionally one toothed or even simple, as shown 

 in figure 9. The ninth seginent is almost sc^uare, not quite ringed 

 by the saddle ; the double dorsal tuft and ventral brush are nor- 

 mal, the latter with several small tufts below^ the barred area. 

 The anal gills are about twice as long as the ninth segment. 



Habits of the Borly Stages. 



Larvse of this species occur almost everywhere except on the 

 salt marshes or in positively foul water. They are common in 

 woodland pools, tho second to canadensis there, and they are 

 dominant in open swamp areas. In the Passaic Valley, specimens 

 appear in early April and in the Great Piece meadow every pool 

 will be found loaded with larvse at almost all times. The eggs 

 do not seem to hatch evenly in Spring and young larvae will be 

 found when there are already pup^e in the same pool. So, not 

 all the eggs laid bv one female seem to hatch during the same sea- 

 son or at one time. Some may lie over until next year, but the 

 majority hatch, because there is a steady increase in number with 

 each brood. Just how many broods there may be in one season 

 depends on weather conditions. As early as May 9th, Mr. Gross- 

 beck found adults plentiful in the Garret Mountains, near Pater- 

 son, and large larvae in the pools. May 21st, there was a young 

 brood in the pools in the Great Piece Meadows and in early June, 

 broods were found in the woodland i)ools along the W'hippany 

 River near Morrist(nvn, and in the Orange IMountains. Late in 

 June full grown larvcC were in the pools on the Preakness Moun- 

 tain, near Paterson, and before Julv ist the adults were out in 



