3IEM0IRS OF THE i^ATIOIl^'AL ACADEMY OF SCIENCES. 
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are known to inhabit the Appalachian and Austroriparian subprovinces than any other region, 
and none have yet occurred on the Pacific Coast above Mexico. The genus is possibly of South 
American origin. I have also in my collection a species structurally and in style of coloration 
quite near H, biundata collected on or near the coast of Brazil by the late Prof. C. F. Elartt. 
SYNOPSIS OF THE SPECIES. 
1. (Subgenus Lochmccus.) Fore wings long; cliscal s^iuarisb black mark inclosed in whitish gray. 
Fore wings pale ash, crowned by four distinct scalloped lines H. manteo 
2. (Subgeuus Cecrita.) Fore wings rather short, especially in ^ ; apex squarish ; discal mark dififuse, indis- 
tinct, gray, with olive green tint, and obscure scalloped inner and outer lines. 
Palpi short, partly black ; fort? wings ash-gray, often without a greenish tint ; transverse lines indistinct, 
discal mark usually inclosed in a large, diffuse Innate pale ashen patch if. gutlivUia 
Palpi larger, blacker; body and fore wings more uniformly and persistently olive-green than in giitlivittaf 
scalloped lines more distinct; no whitish ash discal patch; body and wings sometimes reddish 
instead of greenish - II. Viiuidata 
Antenna* plumose; outer edge and fore wings obliuttc; brown-gray, markings much as in hiundata; 
submarginal series of sublimate brown spots much as in hiundata H. lunaia 
3. (Subgenus Beterocampa.) Antennai with long pectimitious; discal mark curvilinear, black; wings 
greenish or brown, with distinct black stripes and lines. 
a. Fore wings produced toward apex, outer edge very oblitxue. 
Ilody and wings brown, the latter with black marks and reddish brown patches; a large oblique 
siibapical white shade U. ohliqita 
Body and wings green; inner line on fore wings less curved than in ohliqua; marginal black lines 
more deeply scalloped; a thoracic crest M. asiarte 
■Without the subapical white shade; a heavy, broken, scalloped submarginal line; hind wings with 
a whitish line H^puherea 
Subuiargiuiil shade as in pulvcreaj but more dislocated R, helfragei 
b. Fore wings short and square. 
Body and fore wings cither uniformly ocherous or brown, with a broad, white, subapical shade, and 
a broad, curved, dark shade behind the ilistiiict discal murk H. suhroiata 
4. (Subgemia Litodonia.) Antennae of $ heavily pectinated. 
A thoracic crest; thorax and fore wiugs marked with sea-green R. hydromeli 
5. (Subgenns Stematocampo/ (now).) Outer edge of wing oblique; no definite markings; of a pale ash or 
reddish brown hue. 
Two faintly marked scalloped lines on fore wings H. tinicolor 
SYNOPSIS OF THE KNOWN LARV^. 
A. Larvaj with uorinal anal legs and young larvie with normal piliferous warts. 
A broad reddish band, extending from the side of first, third, and sixth abdominal segments.. H. manteo 
B. Young larvae armed with horns; anal legs longer in full-fed larvie. 
Freshly hatched larva with nine jiairs of horns; prothoracic pair of liorns represented by tubercles in 
stages II-IV; spots on the side of first, third, and sixth abdominal segments either absent or small. 
II. giiitivifta 
Young larva (Stage I) with a single pair of horns, persisting as tubercles through Stage IV. A large 
oblique russet spot on side of first, third, aud sixth abdominal segments R. hiundaia 
Full-grown larva with two prothoracic dorsal tubercles i/. pulverea 
Body of full-fed larva thickened in the middle; two dorsal red lines diverging on the first aud widest 
apart on second alidominal segment, then converging only slightly toward the fourth and fifth, 
diverging very slightly again on sixth and Boveuth ; in Stage I with six pairs of horns. . . R, ohliqua 
C. Body with long black anal filaments in Stage I; iu last stage reduced to nearly normal length. 
Body green; a dorsal broad yellow aud red baud; no lateral lines R. unicolor 
