276 BRITISH LEPIDOPTERA. 



moths, but because the caterpillars, judging from the little we know 

 of them, likewise show a similar degree of difference. The genus 

 is diagnosed by Kaye (in litt.) as follows : 



Forewing long and narrow, the costa almost straight in 3 to above the origin 

 of nervure 7 and then flatly curved to apex ; in $ the costa is straight only for a 

 very short distance from base, - and is curved for the greater part of its length ; 

 the outer margin very flatly curved, the inner margin almost straight, the angle at 

 tornus about 175 . Hindwing with costa well arched, apex moderately pointed, 

 outer margin flatly curved to nervure lb, where it is slightly excised ; nervure 8 

 receding from cell near base and then approaching closely to 7 to near -apex, when 

 it sharply recedes to costa ; cross nervure between 7 and 8 weak, and given off at 

 less than half length of cell, nervures 6, 7 shortly stalked. Head moderately large. 

 Legs moderately long, rather slender, spurs on hind tibia very long, the lower 

 pair longer and stouter than the upper. Exclusive of the femur, the three pairs 

 of legs are more uniform in length than is usual, caused by the 1st pair being 

 unusually long. Abdomen long and very pointed in the j , rather blunt in ? — 

 Hyloicits pinastri (type of genus). 



Kirby notes {Handbook, &>c, iv., p. 49) that " Hyloicus includes 

 a number of moderate-sized and rather dull-coloured species found 

 in various parts of the w r orld. The wings are shorter and less 

 pointed than in Sphinx, and the forewings are broader towards the 

 base. The larva is provided with a horn, but much more slender 

 than Sphinx, and is marked with continuous longitudinal lines, instead 

 of oblique lateral stripes." Kirby's genus Hyloicus {Cat., p. 693) is, 

 of course, hopelessly heterotypical. 



Hyloicus pinastri, Linne. 



Synonymy. — Species : Pinastri, Linn., " Sys. Nat.," xth ed., p. 492 (1758) ; 

 xiith ed., p. 802 (1767); "Faun. Suec," ii., p. 287 (1761 ), &c. [Note. — This 

 species has not been known bv any other specific name * from the time of Linne. 

 All the references made under the generic synonymy of Hyloicus, Hb., antea, pp. 274- 

 275, are referable here.] 



Original description. — Sphinx pi?iast?-i, alis integris canis 

 margine postico albo maculato, abdomine fusco annulis albis. 

 Gadd., Diss., 28. Phalaena fusco -cinerea subulicornis, thorace 

 hirsuto griseo, lineis duabus nigris longitudinalibus. Reaum., Ins., 

 i., t. 13, f. 8. De Geer, Ins., i., t. 10, f. 1, 2, 3. Roes., Ins., i., 

 phal. 1, t. 6. Habitat in Pino. Alas superiores in medio lineolis 

 3 nigris inaequalibus notatae (Linne, Sys. Nat., xth ed., p. 492). 



Imago. — 70mm.-1.00mm. Anterior wings slaty-grey, sprinkled 

 with paler scales ; two irregular transverse grey-brown bands, one 

 just before the other just beyond the middle, sometimes uniting 

 beneath the tiny white discoidal spot ; the outer band contains three 

 longitudinal blackish-brown lineolae just below the discoidal ; there is 

 an oblique blackish-brown apical streak ; fringes chequered white and 

 dark brown-grey. Posterior wings blackish-grey, paler at base j 

 fringes chequered white and dark brown-grey. 



Sexual dimorphism. — I am not prepared to give any measure 

 of the differences in size, colour, build, &c, in the sexes, though they 

 appear to be in favour of the 1 being decidedly larger, &c, as in 

 other Sphinges. The antennae are longer in the $, as 1 3-5^1111. 



* Some authors refer asiaticus, Btl., and saniptri, Strecker, as synonyms to 

 this species, and, unless they be treated as aberrations, this must be done, as it is 

 quite clear from the descriptions and types that these authors failed entirely to 

 recognise forms 01 the species agreeing almost exactly with many central European 

 examples. 



