THE ENTOMOLOGIST 



Vol. XXXV.] SEPTEMBER, 1902. [No. 472. 



ON THE LARVA OF LIPHYRA BRAS SO LIS, Westw. 

 By De. T. a. Chapman, F.E.S. 



Two of the larvse of Liphyra brassoUs, sent to the Editor by 

 Mr. Dodd {ante, p. 154), are apparently a full-grown one and 

 another of very much smaller size. These two are so very 

 different that, if they came from different places with different 

 histories, one would never suspect their being at all related. 



The smaller one is 6 mm. long and 2'3 mm. wide, very- 

 flat, reminding one very much of the larva of Camponiscus luridi- 

 ventris (a common alder sawfly) in its general size and form, or, 

 for that matter, of an ordinary Lyccena larva, if we make it first 

 colourless, then nearly flat instead of raised along the dorsal 

 line, and, thirdly, if we somewhat exaggerate the rounded lateral 

 projections of the segmental margins. The segmental divisions 

 as seen dorsally are twelve, of which the first and last, of course, 

 are terminal. White and soft as this larva looks, the margins 

 nevertheless have something of the appearance and structure of 

 the full-grown larva, having a strong chitinous binding, divided 

 into small cells. The prothorax has a slight angle on either 

 side, allowing the front between the two angles to be a transverse 

 straight line ; beneath it is the head, placed quite centrally 

 beneath it, but quite free from it and capable of much move- 

 ment, including probably protrusion in front. The last segment, 

 which is seen dorsally, is the ninth abdominal, and beneath 

 this is the tenth, carrying the anal prolegs ; the true segmental 

 divisions are very plain on a ventral view of the larva. The 

 prothoracic spiracle lies in the fold between the pro ■ and meso- 

 thorax, but the abdominal spiracles are each on about the middle 

 of its own segment, placed dorsally, about half-way from the 

 middle line to the margin. I do not detect anywhere any hairs 

 or tubercles. 



ENTOM. — SEPTEMBER, 1902. T 



