﻿MELOLONTHIDiE OF THE UNITED STATES. 257 



tured, punctures somewhat sparse. Elytra tolerably strongly punctured, slightly 

 rugous, with the sutural costa narrow and elevated; the discoidal ones may be traced, 

 and the submarginal one is very distinct, and somewhat elevated behind the middle. 

 Pygidium of the female conical, not very prominent at tip, smooth, with a few large 

 punctures at base. Pectus clothed thinly with short hair. Abdomen sparsely strongly 

 punctured at the sides and apex ; penultimate segment slightly impressed transversely 

 each side ; last segment deeply emarginate and ciliate at tip. 



Care must be taken not to confound this species with L. glaberrima above described ; 

 the female of the latter has almost precisely the same form, color and sculpture, it is how- 

 ever not so convex ; the punctures of the clypeus are as distant as those of the head, 

 and the pygidium is closely punctured and not conical ; the antennas are 10-jointed, 

 though by the consolidation of the articulations this fact is to be recognized by there 

 being two nodiform joints next the club ; and finally the last point of the maxillary 

 palpi are externally impressed. 



45. L. robusta, oblonga, convexa, castaneo-rufa, obsolete pruinosa, capite densius punctato, clypeo mar- 

 ginato, vix obsolete eniarginato, tborace sat dense puuctato, linea media laevi, lateribus serratis, elytris 

 fortiter sat dense punctatis subcostatis, pygidio (feminse) conico, pectore dense villoso, unguiculis dente 

 longo armatis. Long. -92. 



One female, from Kansas near the Rocky Mountains. More robust than the other 

 species of this division, but hardly ovate, convex, brownish red ; head and breast 

 darker. Head strongly and densely punctured, with the clypeus margined, but 

 scarcely emarginate. Thorax scarcely one-half wider than the head, short, less densely 

 punctured than the headj with a smooth dorsal line not reaching the apex, sides 

 rounded in front, somewhat serrate, sparsely ciliate. Elytra more coarsely punctured 

 than the thorax, slightly rugous, very slightly pruinose, sutural costa broad, and the 

 others slightly marked. Propygidium naked, punctured ; pygidium conical, shining, 

 sparsely but coarsely punctured, apex protuberant, subtruncate. Abdomen paler than 

 the upper surface, punctured at the sides and tip ; last segment flattened in the middle 

 and broadly emarginate at tip; penultimate not impressed. Breast densely pilose; 



ungues with a long tooth. 



Group XI. 



A group containing a single glabrous species having the antennae 9-jointed, with 

 the joints of the stem short and' serrate, the third fourth and fifth as usual consoli- 

 dated, but with distinct inner angles. The clypeus is rounded and broadly reflexed. 

 The last joint of the maxillary palpi is cylindrical, the mandibles are only slightly 

 prominent. The sixth joint of the abdomen is shorter than in the first groups, though 

 not so short as in the following ones. The spur of the posterior tibice of the male 

 is fixed ; the tooth of the claws is medial and short ; the pectus is only very thinly 

 clothed with hair. 



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