MEMOIRS OF THE NATIOjSTAL ACADEMY OF SGIElSrCES. 223 



are known to inhabit the Appalachian aud Austroriparian subproviuces 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 aud in style of coloration 

 quite near 11. hutudata collected on or near the coast of Brazil by the late Prof. C. F. Uartt. 



SYNOPSIS OF THE SPECIES. 



1. (Subgenus Loclimrviia.) Fore wings long; disoal S(iiiarisb blaek mark inclosed in whitish gray. 



Fore wings pale ash, crowned by four distinct scalloped lines H. manteo 



2. (Subgenus Cecrila.) Fore wings rather short, especially in ^ ; apex squ.arish; discal mark diffuse, indis- 



tinct, gray, with olive green tint, and obscure scalloped inner and outer lines. 

 Palpi short, partly black ; fore wiugs ash-gray, often without a greenish lint ; transverse lines indistinct, 



discal mark usually inclosed in a large, diffuse lun.ite pale ashen patch H. guttivitta 



Palpi larger, blacker; body and fore wings more uniformly and persistently olive-green than in guttirilla, 



scalloped lines more distinct; no whitish ash discal ])atch; body and wings sometimes reddish 



instead of greenish H. biiiiidala 



Anteuu:e plumose; outer edge and fore wings oblique; brown-gray, markings much as in hiuiuhita ; 



submargiual series of sulilunate brown spots much as in biiiudnta H. Utiiata 



3. (Subgenus Hvtcrueampa.) Antennie with long pectinations; discal mark curvilinear, black; wiugs 



greenish or brown, with distinct black stripes and lines. 



a. Fore wings produced toward .apex, outer edge very ol)li([ue. 



Body and wings brown, the latter with black marks and reddish brown patches; a large oblique 

 subapical white shade H. oblitjna 



Body aud wings green; inner line on fore wings less curved than in obllqua : nuirginal black lines 

 more deeply scalloped; a thoracic crest H. astarto 



Without the subapical white shade; a heavy, broken, scalloped submargiual line; hind wings with 

 a whitish line H. 2>u Iverea 



Submargiual shade .as in pidverea, but more dislocated H. belfragei 



b. Fore wings short aud square. 



Body aud fore wings either uniformly ocherous or brown, with a l>road, white, sabapical shade, and 

 abroad, curved, dark shade behind the distinct discal mark H. subrotata 



4. (Subgenus Lilodontu.) Antenua> of 9 heavily pectinated. 



A thoracic crest ; thorax and fore wings marked with sea-green H. hydromeU 



5. (Subgenus Slemalocanqia (new).) Outer edge of wing oblique; no definite markings; of a pale ash or- 



reddish brown hue. 

 Two faintly marked scalloped lines on fore wings „ ff, unicolor- 



SYNOPSIS OF THE KNOWN LARViE. 



A. Larva? with normal anal legs and young larvic with normal piliferous warts. 



A broad reddish band, extending from the side of first, thiril, and sixth abdominal segments.. H. manteo- 



B. Young larv;K armed with horns; anal legs longer iu full-fed larv;e. 



Freshly hatched larva with niue pairs of horns; prothoracic pa-r of horns represented by tubercles in 

 stages II-IV; spots on the side of first, third, and sixth abdominal segments either absent or small. 



M. guUUHla 



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, and sixth abdominal segments H. biiindata 



Full-grown larva with two prothoracic dorsal tubercles E. piih-crea 



Body of full-fed larva thickened in the middle; two dorsal red linos diverging on the first and widest 

 apart on second abdominal segment, then converging only slightly toward the fourth and fifth, 

 diverging very slightly again on sixth and seventh ; in Stage I with six pairs of horns. . . M. ohViqua,- 



C. Body with long black anal filaments iu Stage I ; in last stage reduced to nearly normal length. 



Body green; a dorsal broad yellow aud red band; no lateral lines H. viiicoJoK 



