492 BRITISH LEflDOPTERA. 



on April 7th, 1875, and almost full-fed ones May 10th, 1874. The 

 cocoon of this species is very difficult to find in its native haunts, and 

 appears usually to be placed quite close to (or upon) the ground. 



Larva. — The hybemating larva of A. trifolii is a very glassy-looking 

 and colourless caterpillar, the skin being almost transparent, and 

 covered with minute pits. Dorsally : The head is invisible, being 

 retracted within the pro thorax. The longitudinal mediodorsal band 

 is very glassy-looking ; on either side of this, are the subdorsal bands, 

 bearing on each segment the large bosses formed on each side, by the 

 union of the anterior and posterior trapezoidal groups. The two longitu- 

 dinal areas containing these cushions or warts are pale brownish. The 

 segmental incisions are very marked, each incision having a considerable 

 basin-like depression mediodorsally, the depression extending to the seg- 

 ment before and behind the incision. On the meso- and metathorax the 

 dorsal warts are almost united. On none of the segments (thoracic 

 or abdominal) are the subdorsal tubercular cushions readily divisible 

 into the two parts of which they are formed. Each mass bears about 

 ten glassy-looking, pale amber, spiculate hairs, each arising from a dark 

 tubercular point. There are no dark patches between the dorsal warts. 

 Laterally : There is a longitudinal area running between the subdorsal 

 and supraspiracular warts ; in this, on the hinder margin of each 

 segment, is an inconspicuous, transverse, yellow patch. The supraspi- 

 racular cushion is large and prominent. The spiracles are black-ringed 

 and not standing out (as in the larva of A. hippocrepidis in hybernating 

 stage). The subspiracular and marginal tubercles also form raised 

 cushions with a ring of dark points bearing hairs and a larger central 

 one. [There are no black hairs, dorsally or laterally, on the larva in this 

 stage.] Ventrally : The skin is almost transparent and glassy-looking. 

 The head pale brown, the mouth-parts paler. The true legs and pro- 

 legs have the same glassy-looking appearance as the ventral surface ; 

 the true legs with a few short white hairs at the joints, and a single 

 minute terminal claw ; the prolegs with an inner flange of about 

 10-12 very small black hooks. On January 24th, 1897, a larva in the 

 stage just described moulted, and assumed at this instar the plumage 

 characteristic of the adult Anthrocerid. It is now of a clear white 

 ground colour, the opacity remarkable, considering the transparent 

 condition of the previous stage, the skin still pitted, and the incisions 

 somewhat yellowish. Dorsally : There is a broad, longitudinal, 

 mediodorsal band of the ground colour. The anterior and posterior 

 trapezoidals unite to form a large subdorsal mass or cushion on either 

 side of each segment ; the inner part of the mass bears eight minute 

 blackish tubercularpoints, each with a transparent, white, glassy-looking 

 spiculate hair ; the outer part also bears eight blackish points, seven ar- 

 anged in a circle, each bearing a black hair and one central point bearing 

 a much longer whitish one. Between these warts (on successive seg- 

 ments) is an intensely black velvety patch ; part of each patch being on 

 the segment anterior and part on that posterior, to the incision falling 

 between the warts. The prothorax has the subdorsal warts united. 

 The supraspiracular warts are conspicuous viewed dorsally. Laterally : 

 The pale longitudinal band separating the dorsal bosses from the supra- 

 spiracular warts is traversed by a series of transverse conspicuous 

 bright primrose-yellow patches. These commence on the posterior 

 margin of the mesothorax, and are continued on the posterior margin of 



