INSECTS COLEOPTERA 67 



EUMOLPUS Kugellan. 



E. smaragdulus, supra viridi aeneus nitidus, confertim punctatus, pube brevi rigida alba parce 

 vestitus, capite aequali, thorace convexo lateribus rotundato, elytris fortius inordinatim punc 

 tatis. Long. 15. 



One specimen, Sacramento, Mr. Wittick. Resembles in generic characters several other 

 species, which, in form, appear like Pachnephorus, but they are distinguished by the posterior 

 tibiae being not toothed, while the claws are strongly toothed. I have not found any descrip 

 tion or name for this genus, which is readily known by these two characters, and by the thorax 

 not being lobed behind the eyes. 



CHRYSOCHUS Eedt. 



C. cobaltinus, splendide cyaneus vel viridi-cyaneus, nitidus, thorace parce punctulato et dis 

 perse grosse punctato, lateribus postice parallelis, antice subito rotundatis, angulis anticis 

 prominulis, elytris modice punctatis. Long. 45. 



Oregon and California. Larger than C. auratus, and distinguished by the sides of the thorax 

 being more suddenly rounded near the apex, and by the elytra being less sparsely and more 

 distinctly punctured. 



HALTICA Fabr. 



H. puncticollif}, flavo-testacea, ovalis modice convexa, thorace latitudine breviore, antrorsum 

 angustiore, fortius punctato, guttis quatuor nigris ornato, scutello, elytrorum vitta suturali, 

 altera sub marginali ad apicem connexis, dorsalique postice paulo abbreviata nigris ; labro, 

 palpis, antennis tibiis tarsisque nigris ; metasterno testaceo, postice nigro. Long. *3 35. 



Oregon and California. Kesembles closely H. alternata, but differs by the thorax being much 

 more distinctly punctured, and by only the posterior part of the metasternum near the middle is 

 black. I have adopted the name under which it was sent me by Col. Motschulsky. 



H. limbicollis, elongato-ovalis, nigra, capite parce punctulato, lateribus et basi marginatc, 

 limbo toto flavo, elytris subtilius sat dense punctatis, vittis duabus margineque tenui flavis ad 

 apicem connexis. Long. *3. 



Sacramento, Mr. Wittick. Similar to H. pensylvanica, but narrower, with the thorax sparsely 

 punctured. The elytra are not sulcate, and the yellow vittae are broader. 



H. prasina, olivaceo-aenea, thorace latitudine breviore, antrorsum haud angustato, lateribus 

 subrectis marginatis, punctato, postice transversim sulcato ; elytris subsulcatis punctulatis, costa 

 submarginali postice ad suturam flexa. Long. 23. 



San Francisco. Narrower than H. plicipennis, and distinguished by the more strongly punc 

 tured thorax not being narrowed anteriorly, and by the elytra being feebly sulcate. 



H. obolina, oblonga, cupreo-aenea, thorace nifeido convexo, latitudine breviore, antrorsum 

 paulo angustato, lateribus vix rotundatis, parce punctulato, postice transversim sulcato, elytris 

 sat dense punctatis haud costatis. Long. 17. 



San Francisco, not common. The more convex thorax distinguishes this from some allied 

 species in my collection. 



H. lazulina, oblonga, viridi-cyanea, nitida, thorace latitudine breviore, antrorsum subangus- 

 tato, lateribus paulo rotundatis, subtiliter punctulato, postice transversim subtilius impresso ; 

 elytris subtiliter fere obsolete punctulatis. Long. 15. 



