148 BULLETIN BROOKLYN ENTOM. SOC. VOL. VII. March & April 1885.) 
Colias contains moderate sized species, yellow or’ orange in color, 
usually with a broad black margin to both wings and a discal spot on 
primaries. In some species the black is 50 arranged that the inclosed 
yellow space has a rude resemblance to a dogs head. Beneath, the sec- 
ondaries are furnished with silvered discal spots. The antennz are very 
short and stout; the club is truncate, The species are numerous, illy 
defined and largely opinionative. 
Tervas contains small species with markings often similar to those of 
Colias, The primaries are short, with a distinct shoulder near base, rect- 
angular apices and straight outer margin. 
The Papilioninae have but two genera in our fauna, distinct from all 
the preceding forms by having the anterior tibia furnished with epiphysis. 
In this respect these insects approach most nearly to the Hesperidae and 
through them to the He/erocera in which this structure is universal. 
Parnassius has moderate sized species with very thinly scaled wings, 
entire secondaries which are not grooved to receive the abdomen, and _. 
the Q is furnished with a very peculiar pouch near tip. ‘The larva pup- 
ates in a thin cocoon and thus furnishes another link connecting this 
family with the Hesper:idae. The ornamentation consists of black spots, 
some of them ocellate with orange, The antennal club is not arquate. 
Papilio contains large insects, usually black maculate with yellow 
and blue, or yellow maculate with black. The secondaries are usually 
tailed and somewhat elongate, not grooved to receive the abdomen; the 
wings are densely scaled and the antennal club arquate. 
The distinctive characters of the Hfesperidae have been already noted 
and only an enumeration of the genera 1s necessary. Mr. E. M. Aaron 
who has made a special study of this family, informs me that the genera 
at present catalogued are imperfectly and sometimes erroneously defined. 
As he has kindly promised to furnish the Mss. for the synopses of Lepi- — 
doptera when this family is reached, a superficial survey is all that I shall 
at present attempt. 
Carterocephalus differs from all our other genera by lacking the tibial 
epiphysis and having but a single pair of spurs to hind tibia. 
Ancyloxypha contains a small species with blunt primaries, spined— 
median tibia and long abdomen. The terminal joint of palpi is long 
and slender. 
Thymelicus has the same palpal structure but the antennz are trunc- 
ate at tip and the secondaries somewhat prolonged at anal angle. 
Copaeodes is more like Pamphila in appearance, but smaller. The 
antennee truncate, the middle tibia not spined. . ine 
