36 



Chapter II. 



The Danish Culicines Systematically and Biologically Described. 



Genus I. Aedes. 

 Tab I. 



1. A. cinereus Meig. 



A. cinereus occurs in North and Central Europe. Over this area it may easily 

 be recognised among all other mosquitoes more especially in the male sex, the palpi of 

 which are not longer than those of the female; but also the female is easily recognis- 

 able, especially owing to its minute size, the black colour of its abdomen, and the 

 rusty brown or reddish colour of the thorax. In the male sex the thorax is black. 



The species varies a good deal with regard to colour; several species have 

 been established upon these variations (A. obscurus Meig., rufus Gimmerthal, leucopygos 

 Eysell) which now are regarded as synonyms for the species. With regard to the 

 dentition of the ungues the reports differ greatly. KERTESZ (according to SCHNEIDER) 

 indicates that the hind ungues of the females are uniserrate, THEOBALD (1907 p. 539) 

 that the ungues of the female are equal, simple and not uniserrate; GRUNBERG (1910 

 p. 90) the same. 



EYSELL (according to SCHNEIDER) GOETGHEBUHR (1910 p. 86) (EDWARDS 1912 

 p. 261) and SCHNEIDER (1914 p. 24) state that the ungues of the female on all legs 

 are uniserrate and the latter author gives a figure of the claws. He gives the follow- 

 ing formula ? 1.1 1.1 1.1. c? 1.0 1.0 1.1. With regard to the Danish specimens 

 I have got quite the same result as the latter author. 



Larva. Head rounded, wider than long; a notch at insertion of antennae ; front 

 margin arcuate. Antennae rather long, tapering at front, spinose; tuft moderate, in- 

 serted nearer to the base than to the apex; on apex three hairs and a digit. An- 

 tennal tuft multiple; frontal hairs long; lower and upper frontal tuft multiple with 

 six or seven hairs. Eyes large. 



Thorax long, rounded, angled at hair-tufts. Hair formula of frontal margin 

 321100001123. No real hairs upon frontal margin, only two extremely small tufts 

 consisting of from two to five hairs; the other nearer the lateral margin strong. 

 Lateral hairs in multiple tufts; some single, strong hairs. 



Abdominal segments narrow, almost equally long.- Lateral tufts of first segment 

 with four hairs, second with two, third to seventh with one single hair; subdorsal 

 hairs: a series of very short hairs between lateral tufts. Tufts of eighth segment in 

 common arrangement, the dorsal tuft double. Lateral comb only consisting of about 

 twelve to fifteen scales, commonly arranged in a row, each scale with a spatulated 

 base, very long, without median spine, but feathered along the borders. Sipho long, 

 four times longer than broad, tapering a little at apex; pecten very long, reaching 

 over the middle of the sipho, consisting of about twelve to fourteen thorns; the 



