152 • [July. 



respectively, in the followin^r year. Prom others found on October 

 25th and 29th, 1902, twenty moths were reared, May 21st— 31st, 1903, 

 whilst eight more emerged, May 11th — 20th, 1904, from pupae col- 

 lected just previously, viz., on May 10th and 11th, and four others 

 appeared. May 5th — 8th, 1905, from larvae or pupae obtained on the 

 12th of the preceding month. Some of the larvae have produced 

 parasitic flies which are now in Mr. Claude Morley's hands. All the 

 larvae and pupae were ensconced in bunches of spun-together shoot- 

 leaves (either living or dead, according to the time of year) of Myrica 

 gale in an extensive heath-bog in the Isle of Purbeck, Dorset. 



Desirous of adding to the scanty amount of published information 

 reproduced above, I visited the same spot on March 20th last, and, 

 knowing that the great majority of domiciles are usually empty in 

 the spring, secured a good many on Myrica gale, all of which, when 

 examined on April 2nd, proved untenanted with the exception of 

 three, two of which contained pupje* of Dasystoma salicella, lib., 

 while the other yielded a larva — full-fed, of course — of C. rusticann, 

 of which the following description was made on the same date. 



LARVA. 



Length, when moderately stretched, 7 mm. Greatest breadth, 1'4 mui. 



Mead polished, orange-ochreous ; upper mouth-parts dark crimson-purplish in 

 part ; ocelli black, highly polished. Prothoracic plate \evy large, covering the 

 whole of the dorsal portion of the prothorax and the posterior portion of the head ; 

 it is slightly polished, ochreous, and is bisected transversely by a narrow, faintly 

 paler, line. On either side, just below the edge of the prothoracic plate, the 

 spiracle, which is far larger than any of the others, shows as a conspicuous, black, 

 pale-centred, circular raised spot. The larva, which is rather slender, is remarkably 

 cylindrical, and of nearly uniform width throughout, except at the actual extremities. 

 The thorax and abdomen have the skin smooth, and the ground-colour pale olive- 

 ochreous, with a very broad dirty olive-green dorsal line, which is rather narrower 

 anteriorly, and an exceedingly broad sti'ipe of the same colour along each side, 

 becoming somewhat paler towards the lateral flange. Anal plate hardly polished, 

 watery pale ochreous, minutely dark-flecked in part anteriorly, and with an ill- 

 defined dark spot behind the middle. The tubercles show as slightly raised, hardly 

 lustrous, circular spots, nearly concolorous with the ground-colour, though a trifle 

 whiter ; each emits a hair. Spiracles, with the above-mentioned exception, appear- 

 ing as minute, polished, black, pale-centred, circular raised dots. Hairs brownish, 

 those springing from the anal plate being fairly long, and conspicuously so in com- 

 parison with the rest. Ventral surface, and prolegs, pale ochreous. Legs polished, 

 ochreous, with the claws dark purplish-fuscous. 



* These produced a ? on April 2nd, and a <J on the following day. The larva of D. salicella 

 obviously feeds there on Myrica gale, but is apparently searce, for only one other imago, viz. 

 a 9 bred on Ajiril 15th, 1903, has appeared from among the numbers of spun-up shoots of this 

 plant that I have collected at different times in that locality. — E. R. B. 



