LACHNEIS LANESTKIS. 509 



the scutellum fairly conspicuous, large, wider than the head, and follow- 

 ing segments. The mesothorax rather less than prothorax, the 

 remaining segments of the body fairly uniform in size. The segments 

 rather distinctly separated ; skin much wrinkled, in colour almost 

 black ; the tubercles rather tall and slender, the anterior trapezoidals 

 rather larger than other tubercles ; the posterior trapezoidals very 

 small, hardly noticeable. The anteriors bear three (or four) long hairs, 

 the posteriors two small ones. The lateral tubercles appear to be the 

 supra-, sub- and postspiracular, and each of these seems to bear two 

 hairs. The body hairs long (especially the dorsal), white and very 

 slightly serrated ; the longest hairs at least half the length of the larva. 

 The anal segment is dull grey in colour, the anal claspers are spread 

 widely; the prolegs and anal claspers light grey (Bacot, May 9th, 1897). 

 Adult larva : The head is small, tending to be square or trapezoidal in 

 outline; the surface dull, except the triangular clypeus which is shiny; 

 colour black with a narrow white streak along the median suture. The 

 body tapers slightly from the abdominal segments to the head, other- 

 wise of fairly even thickness ; the true legs black and shiny ; the 

 prolegs reddish ; the body velvety black in colour, rather duller and 

 with a bluish tint on the intersegmental membranes and ventral area. 

 The head and body covered with numerous scattered fine, simple, 

 tapering hairs of variable lengths, a few of those on head and 

 prothorax black, the others bright brown in colour. On the dorsal 

 area of each segment from the mesothorax to the 8th abdominal 

 (inclusive) are situated two large patches of fine furry hairs, one on 

 either side of the median line. These hairs look, to the naked eye, 

 similar to the urticating hairs of LasiocamjM querciis, being short, fairly 

 closely set, and all of about the same length. There is a broken and 

 irregular subdorsal white band with a well-marked short transverse 

 band jutting from it at right angles towards the median line, and 

 placed just behind the patch of fur-like hairs, there is, too, a less 

 strongly developed similar transverse extension, rising from the 

 summit of an upward crenulation of the band, and passing imme- 

 diately in front of the fur-like patch. There are also disjointed 

 remnants of a narrow, white, subspiracular band and of a narrow, 

 double mediodorsal white streak. This last is represented by a pair 

 of dots on the meso- and metathorax and a short pair of dashes on 

 the anterior edge of the abdominal segments. Occasionally there is a 

 second dash faintly marked on the posterior edge of the latter abdominal 

 segments. What strikes one about the white markings is the tendency 

 of the mediodorsal and subdorsal series to form a border (more or less 

 complete) to the patches of short, fur-like hairs, thus throwing them 

 into greater prominence. Between the meso- and metathorax, and 

 between the metathorax and 1st abdominal segment is an extension 

 backwards from near the junction of the posterior transverse dashes 

 with the subdorsal band proper. This backward extension joins or 

 nearly joins the front end of the subdorsal band on the following 

 segment and there is no anterior transverse extension of the subdorsal 

 band on the metathorax and the 1st abdominal. The short fur-like hairs 

 undera^-inchobjective, prove to be spindle-shaped needle-like hairs, very 

 similar in general appearance to those of Lasiocampa querciis and Macro- 

 thylacia rubi, but slightly different at base, and with minute serrations 

 which are not found on those of L. quercus-. They are doubtless urticating 



