80 INSECUTOR INSCITI^ MENSTRUUS 



Aedes diantaeus Howard, Dyar & Knab. 



A'edes diantaeus Howard, Dyar & Knab, Mosq. No. and Cent- 

 Am. and W. Ind., iv. 758, 1917. 



This was described from New Hampshire from two dam- 

 aged males, the species being founded solely on the male gen- 

 italia. The ornamentation is correctly indicated in the text, 

 but wrongly in the table. The adult is indistinguishable in col- 

 oration from lazarensis. The mesonotum tends to be yellower, 

 less of a buff or brownish yellow, but the difference is less tiian 

 the variation. The two dark brown lines vary in width ; the 

 posterior lateral stripes are commonly weak, but sometimes 

 well-developed. The male genitalia are, of course, very dis- 

 tinct. 



The males probably swarm high. One evening, at White 

 River, after sunset, a male was seen flying in the top of a small 

 spruce tree in the forest, but no others were observed. 



Larvae occurred in small mossy pools in a spruce swamp. 

 Head hairs in threes ; antennae very long, fully as long as the 

 head, slender, uniformly tapered, a long tuft near the middle ; 

 comb of about 13 scales, each scale terminating in a long 

 thorn ; air tube about three times as long as wide, the last two 

 teeth of the pecten widely detached, followed by the single 

 tuft; anal segment with a large dorsal plate, reaching near the 

 ventral line and roundedly edged. 



The larva is as distinct and characteristic as are the male 

 genitalia. 



One hundred and twent3^-eight specimens were collected, as 

 follows: White River, Ontario, June 14-25, 3 918; Nipigon, 

 Ontario. June 26, 191S ; Dryden. Ontario, June 27-July 2, 1918 ; 

 Kenora, Ontario, July 2, 1918. 



Mr. Knab got 29 specimens which I think are referable here 

 at White River, June 25, 1907. I have no western records; but 

 the species is so similar to lazarensis that it can only be cer- 

 tainly differentiated by males or larvae, which are not at hand 

 from the western places. A specimen taken by Mr. Awrey on 

 Albany River, which I have returned to Ottawa, seems to be 

 this. Another doubtful specimen is before me from Kenogami 



