No. 1. 



BOMBYCINE MOTHS OF NORTH AMERICA— PACKARD. 



91 



HYLESIA ACUTA Druce. 



Hylesia acuta Druce [Biol. Cent. Amer., Lep. Het., I, p. 197, pi. 20, figs. 1, 2]. 

 [Hylesia acota (sic) Kirby, Syn. Cat. Lep. Het., I, p. 792.] 



Imago. — Three o* . Head, the front wide and, like the femora, deep roseate. Thorax 

 dark-brown, with short coarse hairs which are snuff-yellow on the middle of the thorax forming 

 an oval dull yellow-ochre area, and with scattered hairs of the same color behind. The distal 

 half of the abdomen ringed with snuff-yellow; the base is velvety brown, like the thorax, the 

 extremity is dull roseate; beneath reddish brown on the sides. 



Wings of both pairs uniformly claret or dull wine red, becoming a little darker towards 

 the apex. No trace of a basal line or discal spot. Faint traces of an extradiscal line, which 

 is slightly curved and ends in a diffuse cloud on the outer fourth of the costal edge; an oblique 

 dark brown streak extending from the thorax along the base of the inner edge of the fore wings. 

 The fore wings are longer and much more falcate than those of H. alinda, from which the pres- 

 ent species differs in the absence of the markings, in the yellow hairs on the thorax and abdo- 

 men, the head also being wider in front- 



Fig. 1. Venation of Hylesia acuta Druce, cf Jalapa. No discal vein in fore wing and a very slight one in hind wing. 



Hind wings with no lines or any markings. The wings beneath as above, but slightly 

 paler, though darker on the costal and apical region. 

 Expanse of fore wings, <? , 54 mm. 

 Length of fore wing, s , 25 mm. 

 Breadth of fore wing, $ , 12.5 mm. 

 Length of hind wing, S , 18 mm. 

 Breadth of hind wing, <? , 13 mm. 

 Geographical distribution. — Jalapa, Mexico (O. T. Barrett). 



[Dr. H. G. Dyar has just revised the genus Hylesia as represented in the United States 

 National Museum, and kindly supplies the following table:] 



Table of species of Hylesia in United States National Museum. 



By Harrison G. Dyar. 1 



Hind wing at least in <$ with ocellate discal mark. 



Fore wing of o* strongly falcate; <? very dissimilar nanus Walker. 



Fore wing of cT not strongly falcate. 



Ocellus of hind wing of J 1 brick-red with yellow center corevia Schaus; PI. L-XXIX, figs. 5, 6. 



Ocellus red with black or crimson ring. 



Hind wing of c? with a blunt angle below the middle of outer margin lineata Druce. 



Hind wing of c? evenly rounded. 



Ocellus of S with a black ring subaurea Schaus. 



Ocellus of cf with dull crimson ring iola Dyar. 



1 [See also r-roc. U. S. Nat. Mus., vol. 44, pp. 121-134, whero the new species are described. The H. inficita Walker of the table is the insect so 

 determined by Schaus from Costa Rican specimens. It may not be the true inficita, described from Brazil. H. aeneides Druoo runs in the table to 

 the vicinity of melanostigma and gyrci, from which it is known by the rosy (instead of ochreous) abdomen.] 



