34 W. WESCHE — THE LARVAL AND 



The siplion is a little less than three times the length of the base, very 

 •dark, and with a curious appendage at its base, which is very unusual in the 

 species here described (PI. V, fig. 6). It has many plumes of subplumose 

 liairs on its ventral side ; the spines do not begin at the base, being short and 

 dark, and about 5-6 in number. There are also lateral quadruple hairs. 



The anal segment is short, but is remarkable for its papillae, which are 

 longer than the segment and subequal, two of them being distinctly chitinised, 

 iiud the other two darker in colour than the usual type. There is a tuft of 

 long hairs on the dorsal edge ; the beard is at the end, and not on the 

 ventral side ; at its longest it equals the papillae in length ; all the foregoing 

 hairs are simple, but there are lateral plumes inserted in the last third, which 

 iire subplumose. 



Larva 4:^ mm, long, siphon f mm. 



Pupa. 



The pupa has short trumpets, which are more yellow in colour at their 

 «nds than usual, and there are rather long characteristic hairs on the front of 

 the thorax ; it is broad and consequently the hair characters are at various 

 foci; the plumes on the sixth and seventh segments are large and plumose. 

 All the long hairs on the abdomen are subplumose and not at all easy to see. 



But the most striking feature is one that is even more difficult to see ; the 

 easiest way is to break off the last three segments of the abdomen, and it will 

 be seen that the anal plates are notched in the centre (PI. V, figs. 7 & 8). 



Leneth of thorax 2 mm. 



Described from six larvae and three pupse. 



[Larvse found in July in the same barrel of stinking water which con- 

 tained Cidex dissimilis, Theo. ; they are very active in their movements. — 

 W. M. G.] 



13. Culex duttoni, Theo. 



Larva. 



Head very large in proportion to the thorax^ light in colour, and rather of 

 the type of Culex palUdothoracis, Theo. 



Antennse with a large tuft of plumose hairs, and the hairs at the end^ like 

 those in Cidea; alhovhyatiis, Graham, and C. dissimilis, Theo., are branched, 

 perhaps a little more so than in the others (PI. Y, fig. 3). Brushes con- 

 f^picuous ; the mouth-parts are bushy, but the plumes on the face are but 

 moderate in size, though of plumose hairs. Eyes with strongly differentiated 

 •edges ; the pigment spot behind as in C. j^allidotlioracis, and with the small 

 plume of simple hairs present. 



Thorax scarcely differentiated, but with long plumes of plumose hairs. 



The first two segments of the abdomen carry the usual plumes of plumose 



