91 



other; the others with three or four lateral thorns; a large hair-tuft. Anal segment 

 longer than wide, dorsal plate square, only reaching halfway down the sides; dor- 

 sal tuft well developed with two very long stiff hairs. Ventral brush consisting of 

 thirteen rays in the barred area and before it three or four' free rays; every ray 

 carries from seven to ten hairs; anal gills long acute equal. 



Lateral tufts of labrum well developed, no comb-hairs nearpalatum; palatum 

 covered with long soft hairs. Mandibles quadrangular, two stout spines before the 

 collar; a row of long cilia from collar; about ten spines from margin; dentition four 



Textfig. 10. Pond in Stenholtsvang. Aedes cinereus ; Ochlerotatus cantans ; communis, 

 prodotes, rusticiis, diantteus, Cnlicella morsitans. 



to five strong teeth and between them and the row of cilia three long thorns, the 

 last very long and acute; five strong ciliated hairs below the teeth, process below 

 furcate with strong hair-tufts on both tips, a group of hair at base. Maxillae elon- 

 gate, tips conically rounded, divided by a suture; at the apex a large brush of long 

 soft hairs, a strong seta near the apex belo\v the brush. Between the suture and 

 inner margin a coarse coating of short, soft hairs. No spines at margin. Palpes well 

 developed with five little apical digits. Mentum triangular with arcuated sides, the 

 median tooth but small and with about eleven teeth on each side. Colour of the 

 body red brown with bright yellow head and golden brushes on labrum. 



Biology: I have found this peculiar mosquito only in one locality in the little 

 bog of Stenholtsvang near Hiller0d. In the same sample 23/v 1919, in which I found 



12* 



