48 ^V. WESCHE — THE LARVAL AND 



2b. Pectinopalpus fuscus, Tlieo. ? (I) *. 



Larva. 



Head as broad as thorax, light in colour. Anteniipe with a big })lume, the 

 fine secondary hairs of which are longer than the normal ; there are 2-^ 

 long simple hairs at the end ; the mouth-parts are very hairy, and the 

 maxillae are marked and carry long hairs at their ends ; these are best seen 

 on the lateral view (PL II, fig. 10). Face with two single or triple hairs in 

 the middle, two triple ones flanking these and two plumes of six hairs on the 

 outside; all the hairs plumose (PI. II, fig. 11). Besides these, there is a 

 row o£ minute stellate hairs between the eyes, flanked by short plumes, all 

 very difficult to see. 



The thorax is very hairy, with long plumose hairs of normal arrangement. 



The abdomen calls for no special remark. The comb is very difficult to 

 make out, but in a favourable specimen it is seen to be rather away from 

 the base of the siphon (or appears so from the angle of A'ision) and to have 

 some particularly long scales on theposterior part. 



The siphon is nearly as long as the abdomen and is ten times as long as its 

 own base ; the spines, which are weak and colourless, run to a little over a 

 sixth of the length ; a higher magnification shows them to be serrated 

 (PI. II, fig. 12) ; there are also short triple hairs on the surface, rather 

 liable to be rubbed off (PI. II, fig. 10). 



The anal segment is distinctly long, about the same length as the seventh 

 and eighth segments together; the papilla are unequal, and hyaline ; the 

 comparative length of the longer pair to that of the segment is as 3 to 2, and 

 the shorter pair are not quite so long as the anal segment ; they are 

 moderately pointed. The dorsal edge bears long hairs and some shorter 

 ones ; the ventral beard is as long as the longer papillae, and covers the 

 distal third of the segment. 



The larva is 3 mm. long, the siphon If mm. 



Described from three specimens ; pupa unknown. 



[Larvce found in borrow-pits along the course of the railway, early in 

 June.— W. M. G.] 



27. Pectinopalpus fuscus, Theo. ? (II). 



Larva. 

 Resembles the last described larva in some respects, but is stouter and 

 longer. It has less pronounced maxilla\ 



* From this and the succeeding species of larva only a single imago was bred, and owing 

 to an unfortunate confusion it is not yet possible to say which of the two ia the true larva 

 oi P. fuscus. — Ed. ^- ■ ! 



