192 THE entomologist's record. 



Further Notes on Libythea celtis. (With five plates.) 



By T. A. CHAPMAN, M.D. 



In the last Volume of the Kut. Record (xxiv., p. 302) I gave a 

 short account of the egg and oviposition of Libj/t/wa veltis : as I have a 

 few notes and specimens of the larva, it may be useful to say some- 

 thing of these. 



Eggs laid on April 17th hatched on the 23rd. The newly-hatched 

 larva is pale grey with some brown tints on the head. In the 2nd 

 instar the head is nearly black and the rest of the larva is of a neutral 

 grey tint and looks quite hairy (the hairs being aggregated, of course, 

 just after moult). When full-grown in this instar it is 5mm. long, with 

 black head, a pale slatey body, with a paler dorsal line and a paler, 

 nearly white, lateral (subspiracular) line, reminding one much of Pier is 

 or Encldo'e. Seen under a moderate hand lens (dorsally), the appear- 

 ance suggests an Iidxs, due to the great distinctness of the sub- 

 segmentation, giving the impression of a large number of quite equal 

 segments. There are, in fact, four subsegments to each abdominal 

 segment, fairly equal, but the two front ones perhaps rather wider 

 than the two posterior. Beneath the lateral line the flange is not 

 continuous but is divided by an oblique projection on each segment. 

 There are very numerous short black hairs, noAV hardly visible except 

 in profile against a pale background. The larva is of very equal 

 diameter from end to end, the head is only slightly smaller. The pro- 

 thoracic plate presents, on each side, a very narrow black slip, with a 

 good many black hairs, like those elsewhere. The larva has a habit of 

 sitting in " sphinx " attitude. 



In the 3rd instar the larva is substantially as in the 2nd, with an 

 increase in length to 7"5mm. or 8mm. Head black with a pale trans- 

 verse greenish shade. The colour is rather darker, and pale bases 

 around the origins of the abundant black hairs can be distinguished. 



In the following instars the hairs become less obvious, the colour 

 becomes green, most of the full-grown larvje being green with white 

 lateral lines, a few, however, retain a brownish coloration. 



The arrangement of hairs in 1st stage Celtis is, on prothorax, on 

 each side of the middle line a group of four, the 1st (from middle line) 

 and 3rd shorter and slightly posterior to 2nd and 4th. Then two, the 

 second decidedly long, next another long one, all these approximately 

 in a transvere line, then another a little posterior at about spiracular 

 level. On mesothorax on each side, three short hairs about equally 

 spaced in a transverse line, then a fourth rather longer and a little 

 posterior, another longer one at a lower level and another further 

 behind not quite so low. [On the metathorax the arrangement is the 

 same.] On the abdominal segments are i, ii and iii, short hairs well 

 apart, iii a little posterior to i, ii a good deal so. Two hairs, rather 

 longer and more slender below spiracle, the posterior the longer and 

 lower, on 9th and 10th, the arrangement is modified. On the 

 posterior margin and beneath are more ordinary (pointed) hairs, some 

 as long as those already noticed. These expand towards their 

 extremities and have a circle of fine points, the appearance suggests 

 that they are hollow and cupped like those of some Pierids. The 

 longer are about •05mm. in length the shortest about •02mm. The 

 prolegs have 9 to 11 hooks in two sizes and apparently in a single 

 transverse row. (pi. xiii., figs. 1 and 2). 



