NO. 1140. NORTH AMERICAN NOCTUIDAE— SMITH AND DYAB. 175 



Head moderate in size, distinct but not prominent, more retracted in 

 the female, front convex bnt not prominent. Eyes full, well separated, 

 naked and without laslies. Ocelli distinct. Antennae simple in both 

 sexes, but a little thicker and with the joints somewhat marked in the 

 male. Pal])i rather feebly developed, yet reaching well to the front, 

 though not to its middle in the female. Tongue weak, not useful for 

 feeding. 



Thorax stout, convex, clothed with long, fine hair, which forms no 

 tufts, and in well-preserved specimens scarcely outlines the collar and 

 patagiae. Legs of the usual uoctuid type, well developed, unarmed 

 except for the usual tibial spurs. 



Abdomen conic, in both sexes exceeding the anal angle of the secon- 

 daries, clothed with tine hair which forms no tufts. 



Primaries narrow, moderate in length, the outer margin oblique, 

 apex somewhat pointed. In venation normally noctuidous. Seconda- 

 ries trigonate, proportionate, veiu 5 weak and from the cross- vein well 

 removed from 4. 



This genus difters from Acronycta only in the weak tongue and fine 

 hairy vestiture, characters in which ohlimta and lanveolaria are only a 

 little less distinguished. 



Tlieie is, however, an entire absence of the usual Acronyotid appear- 

 ance and maculation, which must be given some weight, and the super- 

 ficial resemblance to Leucama is so great that the species has been 

 twice redescribed in that genus. 



In sexual characters the species agrees with the auricoma groui) of 

 Acro7iycta. 



Our only species, which is the same as the European, is : 



ARSILONCHE ALBOVENOSA Goeze. 



(Plates X, tig. 7, feuialo adult; XVII, i'lg. 2, legs; XXII, fig. 21, male genitalia.) 



Noctua alhovenosa Goeze, Eut. Beitr., 1781, III, 3, p. 251. 



Arsilonche albovenom MoinusoN, Proc. Ac. Nat. Set., Phila., 1875, p. 428. — Harvey, 



Can. Ent., 1870, VIII, p. 35.— Gkotk, Can. Ent., 1883, XV, p. 30. 

 Leiicania henrici Gkote, Bull. Buff. Soc. Nat. -Sci., 1873, 1, p. 10. 

 Ablepharon henrici (jKOTK, Bull. Buff. .Soc. Nat. St-i., 1873, I, p. 112, pi. i, fig. 15.— 



MoKKisoN, Proc. Ac. Nat. .Sci., Phila., 1875, p. 428, pr. syn.- (Jrotk, Can. Ent., 



1883, XV, p. 30, an sp. (list. pr. 

 Lcucania cvanidum (iitoTK, Bull. Buff. Soc. Nat. Sci., 187.3, I, j). 10. 

 Ablepharon cranidum Grotk, Bull. Buff. Soc. Nat. Sci., 1873, 1, p. 112, pi. i, (ig. 16. — 



MoRitisoN, Proc. Ac. Nat. .Sci., Phila., 1875, p. 428, pr. syn. 

 Ahlej)haron fnmositm Morrison, Bull. Buff". Soc. Nat. Sci., 1873, I, p. 275. 

 ArsUonchefumosum Morrison, Proc. Ac. Nat. Sci., Phila., 1875, p. 428. 



Ground color a very pale luteous gray, fading to almost white. Thorax 

 with disk and patagiae more or less shaded with luteous or gray. Pri- 

 maries with all the veins whitish, often margined with slate gray, the 

 intervening space of the ground color. A more i)rominent slate-gray 

 streak runs through the subraedian interspace from the base, where it is 



