12 lilTLLETIN J8, UNITED STATES NATIONAL MUSEUM. 



broad and trioonate Avitli marked or rectangular apices, never <^reatly 

 extende<l, the outer niargiu moderately oblicine, sometimes a little 

 marked centrally. It is not unlikely that this genus^nay come to be 

 broken uj. someday, when there is sutlicient material from other fauna! 

 reo-ions to compare with our own. At present it has seemed to me 

 ditticult to draw lines without creating- even more nanu's than Mr. 

 (Irote has proposed. 



Lomanaltcs differs from BomolocJia oidy in the greatly extended 

 apices ami (he very obli(iue outer margin of the primaries.' The palpi 

 do not (litter from those of edicfali.s, and no other characters of value 

 have been discovered; the genus resting thus maiidy up(.n wing form 

 and general habitus, l^rom Salia it differs by the long palpi. 



I'hiilnipena is a very good genus; robust, Jspecially in the male, the 

 palpi rather short, primaries narrow, apices marlced, outer margin 

 evenly and obliquely curved, inner margin sinuate, relieving the inter- 

 nal angle which thus forms a sort of tooth or projection. This char- 

 acter is unique and thus separates the genus from kyj^eria, to which the 

 narrow primaries and ample secondaries would otherwise ally it. 



HijpcHd, which is placed at the end of the series as an extreme of the 

 development of its type, has narrow primaries and large broad second- 

 aries. Jn the primaries the inner margin is even, not sinuate, the hind 

 angle not in" the least produced but rather rounded. The apices are 

 marked, while tlie outer margin is usually more or less markedly augu- 

 lated at its middle. In this genus also wo tind the longest palpi of this 

 entire series, projected directly forward, snout-like. 



The species so far as they occur in our fauna are largely found east 

 • of the Kocky Mountains. Only four geuera o(-cur on the Pacific Coast : 

 i;i?/>eMJ7is with a variety of our common^, lubricalis; Heteroqramma. with 

 one species, H.paUiffem, found in the West exclusively; an"d ffypena, all 

 the species of which reach California and Vancouver, while three of 

 the species are confined to that fauna. Very few species extend into 

 Colorado, though one species of Keina found there seems i.eculiar to 

 that State. Quite a number of species range into Texas, which seems, 

 however, to have nothing that is at all i)eculiar. Aiizona seems 

 extremely poor in Deltoids, and there is only one species of .Salia that 

 is thus far confined to it. 



The real home of the group is in that region extending from Maine 

 through Canada, west to the Great Lakes, southward along the Mis- 

 sissippi, and eastward through Ohio, along the southern boundary of 

 Pennsylvania to the Atlantic Coast. In this region most of the species 

 now known to us occur, and some of them are confined to it or even the 

 more northern and eastern portions of it. 



All the species fiy at night and are readily attracted to light and 

 sugar; but many of tiiem also start freely during the day, fiying like 

 Geometers and frequenting similar situations. Some forms are abun- 

 dant in grass lands and may Ite found on fences or on bark of trees, 

 and of these are the Hypenini, which readily escape observation by 



