62 U. S. p. R. R. EXP. AND SURVEYS ZOOLOGY 47TH PARALLEL. 
flavis ; abdomine flavo, nigro annulato ; femorum basi tibiis tarsis antennisque ferrugineis, 
femoribus posticis modice elongatis. Long. "65. 
One specimen, San Francisco, Mr. Child. Similar to C. capraea, but, besides slight differences 
in the form of the basal yellow ring-like mark, the two posterior fasciae are connected by a 
yellow sutural line. 
Ulochaetes Lec. 
Caput deflexum, fronte quadrato perpendiculari, pone oculos subito at parum constrictum ; 
oculi emarginati ; antennae inter oculos pone medium insertae ; palpi breves articulis turbinatis 
subaequalibus ; antennae corporis dimidio aequales, articulis 3io et 4to conjunctis 5to aequali- 
bus. Thorax transversus lateribus et dorso acute tuberculatus, densissime pilosus. Elytra 
abbreviata, scabra ad apicem subacute rotundata, humeris valde elevatis. Tarsi posteriores 
articulo Imo sequentibus conjunctis aequali. Alae abdomine longiores rectae. 
This genus contains but one very remarkable species allied to Necydalis. It differs, however, 
by its much less elongate form, by its less constricted neck, and also by the different propor- 
tions of the joints of the antennae ; the elytra diverge posteriorly, showing a tendency to a 
subulate form. 
TJ. leoninus, niger, capite griseo-pubescente, thorace antrorsum angustato densissime longe 
griseo-piloso, antice valde transversim impresso, postice paulo constricto, elytris opacis ad apicem 
late testaceis ; tibiis testaceis apice nigris ; antennis basi obscure testaceis, alis fuliginosis. 
Long. -96. Tab. II, fig. 12. 
Lec. Proc. Acad. Nat. Sc. Y, 82. 
One specimen, found at Prairie Paso by Dr. Cooper. The scutel is smooth and shining, with 
the sides hairy ; the pectus is thinly clothed with grayish hairs. 
AcMAEOPS Lec. 
A. coriacea, nigro-picea, crassa, parum nitida, thorace lateribus acute tuberculatis, elytris 
postice obtusis, rugosis. Long. "75. Tab. II, fig. 13. 
Lec. Proc. Acad. Nat. Sc. 7, 219. 
Piodes coriacea Lec. Journ. Acad. Nat. Sc. 2d ser. 1, 318. 
Oregon. From its large size and stout form this insect resembles in appearance a small 
Prionus, and was, therefore, placed by me as a separate genus ; on a careful reconsideration, I 
could find no characters of importance by which to retain it as distinct from Acmaeops. 
A. fusca, pubescens, fusca, capite confertim punctate, canaliculato, thorace confirtim punctate, 
latitudine vix breviore, antrorsum angustato et ibi lateribus rotundato, ad apicem vix constricto 
fortius marginato, linea dorsali postica laevi ; elytris sat dense versus basin paulo fortius ad 
apicem subtilius punctatis, parallelis postice obtusis. Long. '5. 
Sacramento, Mr. Wittick. Allied to A. calif ornicus Lec, but is larger and stouter, with 
the thorax less rounded on the sides, which are parallel behind the middle; the thorax is also 
more strongly margined and less constricted at the apex; the punctures of the elytra towards 
the base are smaller and more dense than in that species, and the humeri are less prominent. 
A. lugens, atra pubescens, capite confertim punctate canaliculato, thorace confertim punctato, 
linea dorsali postica laevi, latitudine breviore, lateribus antice valde rotundatis, ad apicem 
