﻿MELOLONTHIDJE OF THE UNITED STATES. 275 



4. S. serotina, oblonga, subovata, convexa, piceo-rufa, nitida, margine longius fimbriata, clypeo truncato 



dense, capite parce punctato, fronte transversim impressa, thorace convexo subtiliter sat dense punctate, 

 linea dorsali postice laevi, elytris leviter sulcatis, sulcis in fundo punctatis, antennis flavis. Long. -42. 

 One specimen collected at Sacramento, California, by Mr. J. Wittick, and given me 

 by Mr. Rathvon. Of the size of S. vespertina, but less dilated behind. The clypeus 

 is broader in front than in any of the preceding species, the lateral incisure is slight. 

 The thorax is very convex, much rounded on the sides, and more finely punctured 

 than in the others ; the pectus and coxae are uniformly and densely punctured, while 

 in the other species the punctures are denser on the coxae, and gradually become 

 sparse at the middle of the pectus. The hairs which fringe the edge of the thorax 

 and elytra are longer than in the other species. 



B. 



5. S. iricolor, ovata convexa, nigra, iridescens, capite thoraceque dense punctatis "pilis fulvis erectis 



dense vestitis, elytris sulcatis, punctatis parcius pilosis, antennis testaceis. Long. -29. 

 Burm. Lamell. 2, 2nd, 178. 

 Meloloniha iricolor Say, Journ. Acad. Nat. Sc. 3, 245. 



Middle States. By some strange error this species is placed in the Melsheimer 

 Catalogue of Described Coleoptera as synonymous with Mel. m i c a n s Knock. 



6. S. fimbriata, oblongo-ovata, testacea opaca convexa, subiridescens, capite dense punctato, clypeo ad 



apicem reflexo et late emarginato, thorace minus dense punctato, lateribus magis oblique rotundatis longe 

 fimbriatis, elytris striis uniseriatim punctatis, pectore coxisque longe sat dense flavo-villosis. Long. -42. 

 San Diego, California. Of the same size, but more robust than S. sericea, and very 

 distinct by the more oblique sides of the thorax being fringed with long lateral hairs, 

 and by the hairy breast. The strise of the elytra are not irregularly punctured as 

 usual, but have only single rows of punctures. It is possible that dark colored speci- 

 mens may occur, as mine, although found flying in the evening twilight, do not appear 

 to have become fully hardened. 



7. S. tristis, oblongo-ovata, nigro-picea nitida, convexa, obsolete iridescens, clypeo piano, dense punctato, 



antice emarginato, vix reflexo, capite parce, thorace sat dense fortiter punctatis, lateribus oblique 

 rotundatis, elytris parce punctatis, striatis, pygidio parce punctato, antennis testaceis, pedibus piceis. 

 Long. -32 — -35. 

 Lee. Agassiz' Lake Superior, 226. 



North shore of Lake Superior. Resembles in form the next species, but the thorax 

 is broader. The body above and beneath is shining with but little iridescent lustre ; 

 the clypeus is flatter in front, hardly margined, and the space in front of the trans- 

 verse fine line is longer. 



8. S. sericea, piceo-purpurea vel nigro-purpurea, opaca, sericeo-micans, oblongo-ovata, convexa, margine 



parce fimbriata, clypeo dense punctato, antice emarginato et reflexo, thorace lateribus oblique paulo 

 rotundatis, sat dense punctato, elytris striatis prsecipue in fundo striarum punctatis, pygidio sat dense 

 punctate, antennis pedibusque piceis. Long. -37. 



