114 THE entomologist's RECORD. 



white median spot intensely white, small ; the fringes of forewings concolorous with 

 the outer margin of forewings; those of hinclwings from nearly concolorovis to bright 

 yellow. $ . Rather smaller than that of incridionalis (one wild one much larger), the 

 foi'ewings a little deeper ochreous, the hindwings distinctly more reddish; the band 

 rather more distinct, but still very definite and narrow ; with a similar tendency to 

 pallid nervures on the outer margin of hindwings, and slightly so on forewings. 



7. L. querciis, L. — The British examples tend much to local races. The males from 

 Potton are not unlike the ab. s2Jartii. figured by Hiibner, from Germany, but have a 

 rather wider band and a faint yellow shade that spreads as it were from the middle 

 portion of the transverse bands on fore- and hindwings, suffusing and narrowing 

 the outer marginal areas, and destroying the striking contrast so observable in 

 var. meridionalis, in this respect rather approaching vibnnii. The females are 

 distinctly different inasmuch as the fore- and hindwings are of the same reddish- 

 ochreous tint that characterises only the hindwings of the French races, and the 

 band on the hindwings tends to obsolescence and to blend with the ground colour of 

 the marginal area. The white median spot of the forewings is distinctly larger, 

 whiter, and not ringed so darkly. The tendency to the spread of the yellow of the 

 bands on both fore- and hindwings, in the males from Cambridge and other British 

 localities, is strikingly characteristic, narrowing much the chestnut outer marginal 

 area of the forewings and reducing it on the hindwings to a narrow marginal 

 chestnut band. In the female the tendency is for the outer marginal area to take 

 on the colour of the band entirely in both fore- and hindwings (a characteristic seen 

 most strongly in var. siciila, but only in the hindwings). 



Larvae of Lasiocampa quercus and its vars. callunae, Palm., 



viburni, Gn., meridionalis, Tutt, and sicula, Stand., and of 



cross=pairings between these races. 



By ARTHUR W. BACOT. 



Towards the end of 1896 I received from Mr. J. C. Warburg young 

 larvae of Lasiocampa var. viburni and L. var. meridionalis, reared from 

 parents of Cannes stock. These I was to rear with a view to noting their 

 divergence from each other in their several instars, and also from some 

 L. quercus larvae of English (Dorsetshire) parentage, given me by Mr. 

 Goymour. In January, 1897, Mr. Warburg gave me a few larvfe 

 resulting from a cross between L. var. viburni and L. var. vwridiojialis 

 from southern France. The larvte of the Continental races Avere fed on 

 ivy ; those of the English race preferred privet, but would eat ivy in 

 default. They were all kept in a warm room and fed throughout the 

 winter, spinning up about March, and commencing to emerge in July. 

 Mr. Warburg, who had to leave England on account of his health, 

 passed on to my care all his pup;^ of the various races, or crosses 

 between the races, with a request to obtain certain cross-pairings for 

 him and any others I might think desirable. Thus the stock of pup^e 

 under my care was largely increased both in numbers and variety, 

 and a far better chance of success obtained than would otherwise have 

 been the case. 



List of pup.^ experimented upon. — (1) L. var. meridionalis (Cannes), mixed 

 families. (2) L. var. meridionaUit (Cannes), a single family. (8) L. var. vVnirni 

 (Cannes), a single family. (4) L. var. viburni (Cannes), from collected larvae. 

 (5) L. quercus (Dorsetshire). (6) L. var. viburni x L. var. vieridionalis (white- 

 haired larvae). (7) L. var. viburni x L. var. meridionalis (brown-haired larvae). 

 (8) L. var. callunae (Aberdeen), (9) L. var. sicula, a single family of Sicilian 

 parentage. 



Mr. Warburg's brother had already crossed a ^ vieridionalis with 

 a ? callunae when he handed the pupte to me, and the $ laid a large 

 number of eggs. My own pairings were as follows : — 



(1) July (1st week), <? meridionalis x ? viburni. (2) July 10th, <? viburni 



