82 [May, 



tatis, punctis postice subtilioribus, apice emarginatis at vix armatis, antennarum 

 articulo 3io spina longissima armato. Long. *56 .65. 



Laredo to Ringgold Barracks, Mr. Schott. Remarkable for its very slender 

 form, in which it almost equals E. unicolor, (Stenoc. unicolor Randall) : the 

 fourth joint of the antennas is armed with a very minute spine : the following 

 joints are unarmed, as are the femora: the spine of the third joint extends two- 

 thirds the length of the fourth joint. The elytra are truncate at tip, but the 

 truncate part is slightly emarginate, in such manner that the angles become a 

 little prominent. The antennae of the male are longer, those of the female 

 shorter than the body. 



Oncideres pustulatus, niger, pube brevi fusca dense vestitus, thorace bre- 

 vissimo, spina laterali acuta armato, lineaque transversa subundulata denudata 

 ornato, elytris guttis sparsis denudatis nitidis, versus humerostuberculiformibus 

 ornatis. Long. '15. 



Laredo, Mr. Schott. The anterior spots of the elytra are elevated, those be- 

 hind the middle are flat. 



Aedilis spectabilis, niger, subtiliter dense cinereo-fuscoque pubescens, 

 thorace fusco maculis albis confluentibus utrinque ornatis, elytris basi fasciisque 

 tribus undulatis obliquis fuscis (intermedia latiore), pedibus fusco annulatis, 

 antennis longissimis cinereis, articulis 1 5 apice fuscis, 5to fasciculo apicali 

 interno recurvato ornato. Long. *91. 



Fort Union, Major Sibley. The first five joints of the antennae are densely 

 clothed beneath with fine short erect hair : the apex of the fourth joint is hardly 

 thickened, but at the apex of the fifth joint is an internal brush of long yellowish 

 hairs, w T hich are recurved, so as to form a hooked prominence. The form of the 

 thorax in this species is quite different from A. nodosus, and is more similar to 

 Monohammus, the spine being perpendicular, and the disc more cylindrical : it 

 ought probably to form a new genus, but as the arrangement of the genera of 

 Longicorns is still very unsatisfactory, it is needless for the present to separate 

 species that are obviously allied. 



Ulochcstes Lee. (Cerambyci Lepturidae.) 



Caput deflexum, fronte quadrata, perpendiculari, pone oculos subito, at parum 

 constrictum: oculi emarginati; antennas inter oculos pone medium insertas ; palpi 

 breves articulis turbinatis subasqualibus ; antennae corpore duplo breviores, arti- 

 culis 3 et 4 coniunctis 4to aequalibus : thorax transversus lateribus et dorso acute 

 tuberculatus, densissime pilosus ; elytra abbreviata, scabra, apice subacute ro- 

 tundata, humeris valde elevatis. Tarsi posteriores articulo lmo sequentibus 

 coniunctis oeqnali. Alae abdomine longiores, rectae. 



1. U. leoninus, niger, capite griseo-pubescente, thorace antrorsum angus- 

 tato densissime longe griseo-piloso, antice valde transversim impresso, postice 

 paulo constricto, elytris cpacis apice late testaceis, tibiis testaceis, apice nigris ; 

 antennis basi obscure testaceis, alis fuliginosis. Long. 96 ; lat. '33. 



Prairie Paso, Oregon, Dr. Cooper. This very .fine insect seems allied to 

 Necydalis ; it differs, however, by its less constricted neck, and by the propor- 

 tions of the joints of the antennae, also by its stouter form : the elytra diverge 

 more posteriorly, showing a tendency towards a subulate form. The scutel is 

 smooth and shining, with the sides hairy : the pectus is thinly clothed with gray- 

 ish hairs. 



Mallodon serrulatus, piceo-niger, nitidus capite antice parcius, pone ocu- 

 los den-ius punctato, genis subacutis, thorace transverso, lateribus scabro et in- 

 sequali disco subtilius parce punctato, antrorsum subangustato, lateribus rectis 

 serrulatis, versus angulos posticos paulo refiexis, elytris disperse subtilius punc- 

 tatis. Long. 2-3. 



Laredo to Ringgold Barracks, Mr. Weise. Resembles closely M. c i 1 ip e s 

 Hald., but the sides of the thorax are less serrate, and less reflexed: the disc is 

 also less convex, the mandibles are not elongated, but thick, and emarginate at 

 the end; those of the male of M. cilipes are similar in form. 



