30 W. WESCHE — THE LARVAL A^'D 



liairs are paired laterally. The comb appears from the ventral side to consist 

 of small black scales, each scale with a central spine flanked by some indistinct 

 ciliation. Owing to the dark colour of the larva I cannot see anything 

 laterally. The sub-siphonal plume consists of simple hairs. 



The siphon is short (six units as compared with thirteen of the abdomen), 

 find is about 3^ times as long as the base ; very dark, and darker round the 

 base ; the spines are very dark, close to each other, and becoming longer as 

 they run up for nearly a third of the length of ihe siphon ; they are slightly 

 serrate on the outer base. The valves are very small (PI. YII, figs. 10 & 11). 



The anal segment is small, little shorter than twice the width of the base, 

 •on the dorsal side ; the papilla? are quite yellow and do not contract at the 

 base ; the ventral pair is strikingly small, half the size of the dorsal, w'hich 

 <?quals the segment. The dorsal edge is slightly serrated with some minute 

 spines ; it carries besides two long, and some shorter hairs ; the ventral beard 

 is a little longer than the papillse and runs for nearly half the ventral surface. 

 The figure shows the state of the segment on the larva as I found it ; the 

 under hairs are probably denuded (PI. VII, fig. 12). 



The larva is 5 mm. long, siphon ^ mm. 



Described from one specimen ; pupa unknown. 



[Larvae found in a hollow tree in August ; they were small and did not 

 become imagines till October. — W. M. G.] 



8. Scutomyia marshalli, Theo. 



Larva. 



Head as large as. or larger than the thorax, dark, smooth, and semiglobular. 

 Antennse large, no constriction at the plume, which is of subplumose hairs ; 

 the end is darker with a few short hairs. The brush is not visible dorsally ; 

 iill the face plumes are large and of plumose hair, being very stiff and 

 fan-like. 



Thorax and the first two segments of the abdomen w^ith very large side 

 plumes, the latter also having minute stellate hairs. The comb is difficult to 

 see, and consists of two rows of minute scales. Sub-siphonal plumes large 

 but of simple hairs. 



Siphon stout, highly" chitinised, less than half the length of the abdomen 

 (as 6 to 15) ; spines strong, barbed on their lower sides, they run for ^^j of 

 the length, and there are plumes of six simple hairs above the spines on each 

 side (PL IV, figs. 16 & 17) ; it is quite four times as long as the base. 



The anal segment is longer on its dorsal side than its ventral (as 10 to 7) ; 

 the papilla? are yellow in colour, short, with pointed ends and unequal ; the 

 longer pair are shorter than the segment ; there are very long hairs and a 

 .shorter plume on the dorsal edge, and a bushy strong ventral beard ; all the 

 hairs are simple and longer than the papillae (PI. IV, fig. 18). 



