158 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 47. 



HYLESIA INVIDIOSA, new species. 



Soft gray; discal mark a dark cloud; lines pale, indistinct, con- 

 verging toward inner margin; marginal space pale on lower half. 

 Hind wing with a single pale band, nearly straight, situated just be- 

 yond the end of the cell. Abdomen with ocherous hair, especially 

 dorsally. Expanse, 32-34 mm. 



Cotypes.—T^vo males. No. 15764, U.S.N.M.; Taboga Island, Feb- 

 ruary, 1912 (Busck). 



Comes nearest to athlia Dyar, but smaller, the fore wing not rounded 

 at apex; markings less distinct, the line on hind mng straighter and 

 even nearer the cell. 



HYLESIA CRESSIDA Dyar (?). 



4. Taboga Island, February and June, 1912 (Busck). 



The specimens are jnore rosy than alinda before me from Costa 

 Rica and the fore wing less falcate, agreeing with cressida; but all 

 the specimens are males, and without a female can not be placed with 

 certainty. 



HYLESIA sp. A. 



11. Tabogalsland, January, 1911 (Busck); Tabernilla, Canal Zone, 

 May, 1907 (A. H. Jennings). 



This form lies near 'pollex Dyar, umhrata Schaus, and valvex Dyar, 

 without agreeing entirely with either. The specimens are all in poor 

 condition, so that a positive identification is unsafe. Mr. Busck sent 

 up two distinct species of Hylesia larvse, but made no association of 

 them with adults.* 



HYLESIA sp. B. 



2. Cabima, May, 1911 (Busck). 



Two females, close to schausi Dyar, but less coarse in appearance, 

 less distinctly marked; the discal spots are more distinct than the 

 bands. There are in the collection three other females of the same 

 character, one from Chiriqui, one from Guapiles, Costa Rica, and one 

 from Sixola River, Costa Rica. The Costa Rican females were ten- 



1 Since writing the above, I have received a bred female in good condition from Dr. S. T. Darling, together 

 with preserved larvae, the latter conrpicuously different from either of the larva sent by Mr. Busck. Doctor 

 Darling found the larvae on a Cashew tree (Anacardiaceae) and bred the adults. The form may be named 

 Hylesia darling!, new species. 



Closest to B. pollex. Dyar from Venezuela; markings less bright and contrasted in the male; both sexes 

 with the costa concolorous with the paler part of the wing, not with a strong dark shade as in pollex: discal 

 spots of both wings clouded and more obscure than in pollex; abdomen of female without the paler ocherous 

 posterior lateral tufts, the hairs concolorous with the rest of the lateral ones. 



Type.— Female, No. 1G038, U.S.N.M.; Ancon, Canal Zone, April, 1913 (S. T. Darling). 



iana.— Head rounded, about as wide as high, smooth, cherry-red, the tips of the mandibles and a spot 

 on each side of labrum black. Body robust, cylindrical, tapering a little anteriorly; whitish, with black 

 angular marks and spots; dorsal line forming a series of dashes mtersegmentally and little specks in the 

 centers of the segments; two joined siibdorsal and lateral blotchcb in segmental incisures, a ring around sub- 

 dorsal horns, spot below laterals, and lateral dot and dash on posterior third of segment; spiracles brown 

 with irregular black dashes between; below a broad straight pale substigmatal area, then a blackish 

 broken and vacuolated subventral band, the venter itself pale. Thoracic feet reddish; abdominal ones pale 

 with black claspers. Horns whitish with pale branches and hairs, subdorsal, lateral, and substigmatal 

 rows and single dorsal one on joints 12 and 13, none on anal plate, which is light reddish with black area 

 before it on joint 13. No cervical shield. Horns all about the same length, the anterior and posterior 

 ones but slightly longer and slenderer, none as long as the diameter of the body. 



