778 ZOOLOGY— INSECTS. 



THECLA NINUS, Edw. 

 Thccla Ninus, Edw., Trans. Am. Ent. Soc, 1871. 



Three specimens of this species were taken on willow blossoms on the 

 South Park road, four miles from the park, on the 17th of June. No others 

 were seen during the season. 



THECLA MELINUS, Hiibner. 



Thccla Ilumuli, Haeris, Insects Injurious to Vegetation. 



This was brought by the expedition from Colorado in 1871. I took 

 one specimen, August 3, on the Georgetown road, in the mountains. 



t THECLA SYLVINUS, Boisd. 



Thccla Sylvinus, BotSD., Ann. Ent. Soc. France, 1852. 



This Californian species was brought in by the expedition of 1871; but 

 the precise locality was not noted. 



t THECLA SIVA, Edw. 

 Thccla Siva, Edw., Trans. Am. Ent, Soc. Phila.. 1874. 



Male. — Expands 1 inch. Upper side castaneous, slightly brown at base ; 

 the costal margin of primaries and both hind margins rather broadly bor- 

 dered with fuscous ; secondaries have two tails, the outer one short, the 

 other long, 0.16 inch ; both dark fuscous, tipped with white ; fringes fuscous. 



Under side light fulvous, washed with pale metallic-green, densely on 

 the costal and upper part of hind margins of primaries, and over the whole 

 of secondaries ; a common pure white band crosses the disks of both wings, 

 on primaries a little convex outwardly, and formed of lunules which are not 

 quite confluent ; on secondaries, slightly wavy, and confluent ; on the basal 

 side of this band, the fulvous ground color is deeper than elsewhere, and on 

 secondaries several of the white spots are edged by a line of black scales ; 

 between the band and base no spots or markings on either wing ; secondaries 

 have the hind margin edged with white, the outer angle fulvous ; the inter- 

 spaces along the margin between the discoidal ncrvules and anal angle gray, 

 caused by black scales on a white ground ; on the lower median interspace 

 above, the gray patch is a rounded blackish spot on ferruginous ground, and 



