44 W, AVESCHE — THE LARVAL AND 



close to each other ; increasing in size as they leave the base, they run for 

 one-qnarter of the length of the siphon (PI. I, fig. 13). There are about 

 four pairs of double hairs showing on the ventral surface, and about the same 

 on the dorsal, and the valves are fairly large. 



The anal segment is moderately long, the proportion of the lengtli to the 

 basal width being as 7 to 4. The papilke are unequal in length, two being 

 about 14: units and the others about 25 ; they are hyaline and pointed. 

 There are sockets for probably long hairs on the dorsal edge and a moderate 

 beard on the ventral side, but the specimens have suffered considerable 

 denudation. 



Larva 3i mm. in length, siphon IJ mm. 



Described from four larvae ; pupa unknown. 



[Larvoe found in borrow-pits along the course of the raihvay, early in 

 June.— W. M. G.] 



22. Culex caliginosus_, Graham. 



Larva. 



Head moderately large, dark, not so wide as thorax. Antennse rather 

 thin ; plume small and of simple hairs (PI. II, fig. 14). Maxillse very hairy ; 

 bruslies not so hairy as usual. The plumes on the face are of moderate size, 

 of stiff straight simple hairs. 



The thorax calls for no remark, except that the plumes on the sides are 

 rather short, consisting of straight hairs, but they are so covered with 

 parasitic growths, that I cannot be sure if they are plumose or not. 



Plumes on the first and second segments of the abdomen comparatively 

 short, and on the remaining segments shorter stilly and simple. Comb 

 consisting of a single row of at least ten scales ; seen from a semi-dorsal 

 view they are claw-like in appearance (PI. II, fig. 15). The sub-siphoual 

 plumes consist of simple hairs, each straight and not tapering ; the siphonal 

 ones insignificant. 



Siphon rathei* short and stout, its length, compared with that of the 

 abdomen, being as 5 to 13; rather less than 4 times as long as the base, 

 perhaps 3^. The spines begin at the base with four small serrate dark ones 

 close together, finishing with a fifth larger one ^ ; then come at intervals 

 three large ones with lighter bases_, which extend slightly beyond the middle; 

 beyond them on each side is a small stellate hair. It is as well to say that 

 the spines are difficult to see at the base ; the larger ones show quite easily, 

 but a great deal of manipulation is necessary to get the siphon lying quite 

 fiat in the trough (PI. II, fig. 13). 



* These are the appearances with low powers. I have made a preparation of this siphon 

 and find a very minute one below tliose mentioned ; the serrations on the uppermost spine 

 are more marked than tliose figured on PI. II, fig. 12. 



