THE GENUS LEUCERONIA. 159 



base of mandibles is bairless ; antenna? black, last joint not broadened ; 

 mandibles striato-punctate, black, fringed beneath with orange-fulvous 

 hair ; a tooth behind mandibles ; mesothorax and scutellum dull, 

 with numerous shallow punctures, thinly clothed with erect dull 

 white hair ; no bands of pubescence at sutures ; tegulae piceous ; 

 wings dusky, darkest at apex, nervures brown, second submarginal 

 cell receiving first recurrent nervure almost at its extreme base, and 

 the second very near its apex ; legs black, pubescence on femora 

 white, on tibiae short, thin, and fulvous ; spurs light ferruginous ; 

 the four hind tarsi ordinary, the pubescence on inner side of hind- 

 most strongly orange-fulvous ; anterior femora ordinary, black, with 

 long white hairs ; anterior tibiae black, with a short sharp spine at 

 apex ; anterior tarsi honey-colour inclining to ferruginous, last joint 

 and apical half of the one before fuscous ; first joint deeply hollowed, 

 canoe-shaped, produced and somewhat curved at end, its rounded apex 

 resembling a finger-tip ; inner margin of the hollow with a continuous 

 fringe of short black hairs, outer margin darkened, but having only 

 fulvous hairs ; hind margin with the usual long fringe of white hairs, 

 none of which are black at ends ; second and third joints flattened, 

 with a conspicuous dark spot beneath ; fourth joint simple ; anterior 

 cox83 with a long spine, no patch of bright hair near its base ; middle 

 coxae unarmed ; abdomen short, well punctured, with rather long thin 

 dull white hair on basal segment above and beneath, but not at sides, 

 and more or less on sides of ventral segments to the apex ; hind mar- 

 gins of second to fourth dorsal segments with a narrow yellowish hair- 

 band, very well defined ; last segment concave in the middle, its 

 margin with a deep but rather narrow emargination, the margin on 

 each side of this minutely denticulate ; the subapical ventral teeth 

 obsolete. 



Hab. Colorado Springs, Colorado, middle of July. (Ckll. 

 3558.) Differs from Jidelis in the face being more narrowed 

 below and the venation. Mr. Fox has also seen this variety from 

 California. 



Mesilla Park, New Mexico, U.S.A. 



THE GENUS LEUCERONIA OF AUEIVILLIUS. 



By A. G. Butler, Ph.D. 



In a paper upon the African genera of Pieridse (Ent. Tidskr. 

 1895, p. 256), Prof. Aurivillius places Teracolus next to his new 

 genus Leuceronia, under a section having only eleven veins to 

 the front wings. Had the author consulted a paper which I 

 wrote some years previously, " On the inconstancy of a generic 

 character in Nepheronia arabica" (Ent. Mo. Mag. 1886, p. 259) 

 he would have discovered that the eleven-vein peculiarity which 

 exists in some examples of L. buquetii and its racial or seasonal 

 forms was altogether abnormal. 



