338 



THE ENTOMOLOGIST S RECORD. 



Limnius has the disc of the thorax dull, by Mr. Champion's statement 

 that nos. 8 and 4 can be matched in a series of L.tro(ilo(hjtet< from Slapton 

 in his collection, since he does not say that he has specimens inter- 

 mediate between those two forms. We agree with Mr. Champion that 

 it is worth while to call attention to these obscure insects, and hope 

 that coleopterists will look up their specimens of this genus with the 

 view of clearing the matter up. 



Whether photo-micrography will ever take a front place in ento- 

 mological illustration is doubtful, but as practised by Mr. Edwards it 

 certainly affords a convenient means of comparing the contour and 

 sculpture of small insects. 



On some races of Lasiocampa quercus. 



By J. C. WARBURG. 



(Concluded frniii ji. 317.) 



SicuLA Derivatives. — (1) L.hyhr. sioda^ X weridionalix $( = 9(^ 

 X 2 ? ). — Mr. Bacot obtained a pairing of these two moths (U. August 

 24th, 1897), fromwhichhebred4imagines,3<? sandl $ . Thesamemale 

 was paired twice(if not three times) . The ova given me were very green, and 

 I anticipated that they would be sterile. They hatched, however, and the 

 larvffi were very red-brown-haired on the dorsal area, with a very few long 

 white hairs (derived from the ? parent I suppose) sprinkled over the 

 sides, very few on the back. I obtained four pupte (the last May 1st, 

 1898), and had only three emergences, all 3' s, between July 30th and 

 September 2nd, 1898. The specimens are more like var. meridionalis than 

 var. sicula. The band on the forewings is much as in var. sictda, the spot 

 rather larger than in either of the parent races. The predominance 

 of var. )in'ridio)ialif> appears in the hindwing, which has the border, 

 though a little lighter than in var. weridionalis, brown and not 

 ochreous, and the band narrow. In a male which Mr. Bacot has 

 given me of his rearing (which spent its whole life in England, while 

 mine were in Cannes in the larval and part of the pupal stage) the 

 dot is quite small, the only point in which it differs in the least from 

 var. weridionalis being a certain intensity of colour in the narrow band 

 of the hindwing, due to the orange-yellow coloration of the band in 

 var. sicula. Two of these were paired, and the descendants are 

 described next. 



(2) L. hybr. <? (sicula x meridionalis) X ? [(meridionalis x rihurni) x 

 (meridionalis x ribiirni)] [= ^ (9 X 2) x i; (6 X 6)] . —The male in this case 

 was placed with three females. The ova, lot 3610, from one or more 

 of these were laid about July 30th, 1898, hatched August 22nd, 1898, 

 first moult September 3rd, second moult about September 10th, third 

 September 25th, 1898, fourth about October 19th, 1898. The first 

 spun up December 12th, 1898. The larvre on hatching were dark 

 brown with pale whitish dorsal line scarcely divided by the bluish 

 segmental divisions. The dark brown sides of first four segments 

 with long white hairs. Head black. After first moult bright rusty 

 orange. The pattern on the back consists of orange lozenges with 

 dark subdorsal /^-marks. Head pale blue, face paler. Collar rather 

 large, orange. First segments with long white costal hairs, sides with 

 white hairs. Long scattered white hairs. My only two specimens 



