﻿MELOLONTHIDiE OP THE UNITED STATES. 285 



ceding by the silvery scales of the under surface and pygidium, and by the stronger 

 pubescence. The thorax is not as wide. 



3. H. convex ill a, oblonga, picea, subtus et pygidio parcc pubescens, et subargenteo-squamosa, supra 



parce breviter pubescens, pallide squamosa, thorace latitudine paulo breviore magis convexo, lateribus 



magis rotundatis, elytris baud costatis ; unguibus anterioribus fissis, medio internoplus duplo breviore, 



postico integro. Long. *24. 



One specimen, Sacramento, Mr. Wittick. Resembles the next species in the very 



small size of the middle inner claw, but differs by the more convex rounded thorax 



and by the pubescence, which is no longer on the thorax than on the elytra. 



4. H. pubicollis, oblonga, nigra, subtus et pygidio parce pubescens, subargenteo-squainosa, supra 



pallide squamosa, capite thoraceque longius pubescentibus, hoe latitudine paulo breviore, lateribus 

 obliquis rotundatis fimbriatis, elytris piceis vix breviter pubescentibus baud costatis, unguibus ante- 

 rioribus fissis, interno medio plus duplo breviore, postico integro. Long. *28. 

 Of California, Mr. J. Child. Of the same form as the preceding, but differing by 

 the elytra being free from lines or elevations, and by the longer hair of the thorax. 



5. H. c a 1 1 i p y g e , oblonga, nigra, subtus et pygidio parce pubescens, dense argenteo-squamosa, supra 



pube erecta in thorace longiore sat dense vestita, pallide squamulosa, nigro-punctata, tborace convexius- 

 culo, latitudine parum breviore, lateribus fimbriatis obliquis rotundatis, elytris castaneis, costa dorsali 

 parum notata, postice paulo retusis ; unguibus anterioribus fissis, minoribus vix duplo brevioribus, pos- 

 tico integro. Long. -30 — 34. 

 California, Mr. J . Wittick. Of the same form as the preceding, but distinguished 

 by the pubescent elytra being slightly retuse behind, and concave towards the suture, 

 and by the splendid silvery lustre of the pygidium and under surface. In one speci- 

 men the scales of the thorax are more condensed along the middle and sides. 



6. H. debilis, elongato-oblonga nigra, squamis angustis albis undique minus dense conspersa, parce 



cinereo-pubescens, thorace pilis longioribus erectis vestito, latitudine vix breviore, lateribus rotundatis 



haud obliquis, unguiculis anterioribus fissis, postico integro. Long. -25. 

 One specimen found in Pennsylvania was kindly sent me by Dr. Melsheimer. Of 

 the size and appearance of H. convexula, but more elongate, with the sides of the 

 thorax less rounded. The thorax is hardly distinctly narrowed in front, except in 

 consequence of the gradual curvature of the sides, which thus do not appear oblique, 

 nor at all angulated. The elytra are at base wider than the base of the thorax, and 

 somewhat retuse near the apex. The middle claws are wanting, the outer one of the 

 anterior tarsi is one third shorter than the inner one. 



7. H. modesta, oblonga, nigra, vel testacea, capite thoraceque fuscis, subtus et pygidio parce pubescens, 



argenteo-squamosa, capite thoraceque pube erecta vestitis, hoc pallide squamuloso, planiusculo, lateribus 

 obliquis parum rotundatis, elytris pilis fusco-pallidis depressis lanceolatis minus dense vestitis, obsolete 

 costatis, ssepe testaceis : unguibus anterioribus fissis, minoribus duplo brevioribus, postico fisso. Long. 

 •24—31. 



! Hald. Proc. Acad. Nat. Sc. 1, 304. 

 Hoplia singularis Burm. Lamell. 2, 192. 



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