134 FIFTH REPORT OF THE ENTOMOLOGICAL COMMISSION. 



Stretch, is nocturnal in its habits, and in the day-time may be found 

 crowded into holes and cavities (generally in families), and often in 

 places where it seems scarcely possible for them to penetrate. It is 

 full-fed about the end of June, and the imago is disclosed during the 

 latter part of July. The cocoon is composed chiefly of the hairs of the 

 larva, and, although of considerable density, is but slightly bound to- 

 gether with silk. 



Larva. — Head dark brown, very large ; thoracic legs reddish brown, abdominal legs 

 tawny. Body stout, depressed, densely clothed with moderately long rich-browu 

 hairs of uniform length, giving the larva a brush-like appearance. The sides of the 

 body, as well as the head and anal segment, have long silky scattered hairs of a tawny 

 yellow. Length, 1.50 inches. (Stretch.) 



Moth. — Bicolorous, baff-yellow and vermilion. Fore wings with five subhyaline 

 smoky, transverse bands, margined with black, less oblique than usual. The basal 

 band consists of a small costal spot and an outer median large round spot. Second band 

 regularly curved, third hardly oblique, waved. The outer ones nearly parallel with 

 the outer margin. Hind wings transparent except on the pilose inner margin, which 

 is tinged with vermilion. Abdomen above, including the base of the anal tuft, ver- 

 milion. Beneath, pale buff, the costal spot re-appearing. On the costa of the hind 

 wings near the apes are two dusky square spots, which do not appear on the upper 

 side. Legs ringed on the femora and tibi;©. One ring on the end of the tibiae, and 

 each tarsus annulated on the basal half with smoky pale brown. Femora vermilion 

 beneath. Expanse of wings, 2 20 inches. 



185. Halesidota tesaellata (Abbot and Smith). 



Found August 29, 1872, on laurel oak, a yellow, white tufted Hal- 

 esidota larva. Others that were found on hickory are probably of the 

 same species. Both, when full grown, are mouse gray, with a darker dor- 

 sal ridge. Two long black pencils near posterior end and four near the 

 head, on joints one and two, and six shorter and thinner white ones. 

 (Riley's unpublished notes.) 



186. OrgyiagulosaKj. FiA'wa.Tds. 



The moth closely resembles the Californian 0. vetusta. 0. gulosa is 

 always much smaller than O. vetusta; the white spot near the inner 

 angle is less distinct and the lines on the fore wings are invariably 

 more clouded and confused. Expanse of wings, .75 inch. The cater- 

 pillar feeds on the oak in California, while 0. vetusta feeds on the lupine. 

 (H. Edwards.) 



The larva. — Ground color, as in 0. vetusta, velvety black ; head jet black, without 

 the yellow frontal line, and with the mouth-parts dull yellow ; second segment with 

 the usual complex series of black hairs. Between them are two dark, brick-red 

 tubercles; third has two orange central tubercles and two brick-red ones on the 

 sides; fourth has a black central tuft, with two brick-red ones on the sidesof it ; the 

 fifth, sixth, and seventh have each a white central tuft, with two brick-red tubercles 

 on each side; the eighth, ninth, and tenth each with six brick-red tubercles; the 

 eleventh has a central tuft of black hairs, directed posteriorly, with two brick-red 

 tubercles. Anal segment black. From the base of all the red tubercles arise bundles 

 of black and white hairs, almost wholly white on the sides. Between the seventh and 

 eighth segments are some bright orange dashes, which marks are also indistinctly seen 

 on the anterior segments. Food plant. Quercus, of various species. (H. Edwards.) 



