TROCHILIUM CYNIPIFORME. 49 



these pupae obtruded themselves from their cocoons so 

 far as to leave only the three hinder segments within 

 them. (W. B., Note Book II, 21.) 



Trochiltum sphegiforme. 

 Plate XXVIII, fig. 1. 



On the 17th June, 1867, 1 received from Mr. Charles 

 Tester, of Sherlock's Farm, Balcombe, a full-grown 

 larva of this species, which he had found burrowing 

 in the stem of an alder tree. 



This larva was about an inch in length ; its flattened 

 head was of a purplish red-brown colour ; the second 

 segment, which was very much larger than any other, 

 bore a shining plate outlined with brown ; there was 

 also a shining ochreous plate on the anal segment. 

 The body was of a pale yellowish flesh colour, with 

 the dorsal vessel indistinctly seen through the semi- 

 transparent skin. The spiracles were brown but not 

 very distinctly visible, and there were a few short 

 fine hairs in the usual situations. (W. B., Note 

 Book II, 22.) 



Trochilium tipuliforme. 

 Plate XXVIII, fig. 3. 



This occurs in the stems of black currant, and 

 sometimes in those of red currant. A larva I found 

 on the 22nd of March, 1869, was full grown ; it was 

 three-quarters of an inch long; the head brownish- 

 red, the back of the second segment highly lustrous 

 and pellucid (generally tinged with red), showing the 

 margins of the head lobes through it. The colour of 

 the body was rather an opaque yellowish flesh colour, 

 the ordinary tubercular warts transversely oval and 

 shining, but with a polish not quite equal to that 



vol. II, 4 



