58 



short, triarticulate, densely clothed ; first joint stout, compressed, wid- 

 est at the apex; second joint nearly thrice the length of the first, cy- 

 lindrical, slightly curved, tapering slightly towards the aj^ex ; third 

 joint much slenderer than the second, not one third its length, cylin- 

 drical, rounded at the apex : antennae of the male more or less deeply 

 bipectinate for about two thirds of their length, the pectinations beau- 

 tifully fringed with most delicate setce ; of the female simple : head 

 densely clothed, a fascicle of hair-like scales at the base of the anten- 

 nae : thorax densely clothed, scarcely crested : wings entire : anterior 

 tibia3 of the male furnished with an elongate corneous plate ; posterior 

 tibiae quadrispinose : abdomen tapering, rather long and not very stout; 

 anal tuft in the male moderate, in the female none. 



It will be seen from the above characters that this genus differs but 

 little from the preceding in structure, except in its longer maxillae and 

 the proportionate length of the joints of the palpi, and in the antennae, 

 which though more deeply pectinated in some species than in others, 

 are always less so than in Heterocampa; but the larvae of the two 

 genera are so widely different, that little doubt can rest on the pro- 

 priety of the separation. This genus is chiefly found in the northern 

 states ; all my specimens were taken at Trenton Falls. Of the eight 

 or nine species that I took there I shall only describe one which oc- 

 curs also in the south, as, besid(>s the evidence of Abbot's drawing, I. 

 have seen a specimen from Georgia. The general colouring of the 

 genus is greyish, more or less tinged, in some species, with olive, and 

 marked with fuscous strigae. 



Loch. Manteo.* Alis anticis cinereo-fuscis, strigis numerosis, 

 transversis, obscurioribus, serie marginali punctorum nigrorum, 

 guttaque centrali alba in qua punctum geminatum nigrum. 

 (Alar. lat. 1-75 unc.) 



Head, thorax and abdomen deep ash-coloured : antennae ochra- 

 ceous. 



Anterior wings pale ash at the base, beyond darker ash, more or less 

 tinged with fuscous, crossed by various rather indistinct fuscous stri- 

 gae, one considerably before the middle, followed immediately by an 

 abbreviated one not reaching to the median nervure : beyond are three 

 or four indistinct strigae, often almost coalescing so as to form a fuscous 



* Manteo, an Indian chief, invested by Raleigh lord of Roanoke ; the first British 

 American ]jcerage. 



