MEMOIRS OF THE NATIONAL ACADEMY OF SCIENCES. 



241 



;( which shows that in this as well iis iu Schiziira and perliaps sonu; other genera of Notodoutidie 



there may be useful specitic characters iu the front of the head). Other differences may be seeu 



by comparing our camera drawings with flg. 82. The vestiges of the 9 sexual aperture ai'e oval, 



and shorter than in H. fiiitttvitfa. Behind the .mesoscutuiu the dark transverse line or band 



usually present is formed of six black tubercles (these iu my single specimen may be somewhat 



deformed in this respect and not entirely normal), which are not 



square, but veiy short and transversely oblong, but otherwise as 



hi //. (/uttiritta. Length, 18-19 mm. 



Habits. — The habits and distribution of this species are very 



similar to those of IT. guttivifta. In Providence the larva' in the 



second stage occurred July 1, and the fully fed larva occurs as late 



as September 10. 



In Maine I have found larv;e 10 mm. iu length feeding on the 



rock majjle July 21, and the fully developed caterpillars occur there 



late in August and during the early part of September. As in H. 



juftiritta, the young horned larva shakes its head rapidly from 



side to side ■wheu disturbed. The larvie when nearly or quite fully 



grown are often observed resting on the midrib on the underside of 



the leaf. When full-fed they leave the tree and wander about before 



pupating. EileyLas captured the moth iu May and in August. 



Food 2}Jants. — The red and sugar maple (Packard); "tire cherry, 



yellow birch, white birch, willow, witch hazel, dogwood, beech, hick- 

 ory, etc. (Dyar; see also the food plants in Dyar's descriptlou refer- 

 red to in Ent. Amei."). 



Geographical distribuiion. — lUunswick, Me. ( Packard). Iu Frau- 



conia, N. H., whudi appears to be an outlier of the Hudsonian fauna, 



this moth IS less common, fewer having been captured at liglit by INIrs. Slosson than of H. 



guttiritta. which is more freijuently collected. 



Massachusetts (Harris Coll.); Plattsburg, N. Y. (Hudson); NewJersej', Pennsylvania (Palm); 



Providence, R. I. (Clark, Packard); New York (Hulst); Wash- 

 ington, I). C, New York, Illinois, Missouri (Riley. U. S. Nat. 

 Mus.); Kittery, Me., Tiffin, Ohio, Champaign, 111, (French); 

 North Carolina (Morrison); Winter Park, Fla., reddish form 

 (Mrs. Slosson). 



The southern and southwestern limits of this species are 

 not known; it has not been discovered in Texas nor in the 

 Rocky Mountain region. It is recorded by Druce from Jalapa, 

 Mexico, and Volcan de Atitlau, Guatemala, 2,.-)00 to .3,500 

 feet elevation ; San Geronimo, Guatemala, and Panama, Volcaa 

 de Chirique, 2,000 to 3,000 feet elevation. Mr. Druce adds: 

 "The Central American specimens before me agree well with 

 Walkers type in the National collection. The female example 

 from the State of Panama is more distinctly marked with dark 

 brownish spots than aiij' I have seen from North America, but 



Bpecimens from Columbia in my own collection are exactly like those from New York.'' (P. 234.) 

 It seems strange that so distiiuit a species as H. obli(iuii should be regarded by Mr. Druce as 



3 synonym of H. hiundala. 



The type of "X. olivata'' is in the Cambridge Museum. 

 S. Mis. 50 1 G 



Fig. S3.— Pupa of Ilehrocampa biun- 

 data. 



Fig. 84. —Pupa of IT. binndata; end of Imdy. 



