NORTH AMERICAN COLEOPTERA. 1 1 7 



Descriptions of new North American SCARAB.1^ID.£. 



BY GEORGE H. HORN, M. D. 



The species described in tlie following pages introduce three genera 

 into our lists which were previously not with certainty known to occur 

 with us : Grlaresis, Phytalus and Orizabus. The last two had occurred 

 so near our southwestern border that species were confidently expected, 

 but I know of no reason why Grlaresis could have been expected to occur 

 in the same region. 



The full number of Listrochelus is not yet complete as there are yet 

 wanting species with structural characters filling the evident blanks 

 which I have illustrated in a table published some time ago. 



In Plusiotis new species rarely present themselves, while new Cremas- 

 tochili appear with sufiicient frequency to disarrrange all the synopses 

 which have been published. 



OL,.lRESIS Erichs. 



G. niendiCil n. sp. — Oblong oval, robust, dark brown, opaque. Head rugu- 

 lose, occiput vaguely transversely carinate. Thorax nearly twice as wide as long, 

 slightly narrower in front, sides nearly straight, the margin crenulate, disc convex, 

 a subapical impressed line, a median impressed line deeper posteriorly, a vague 

 fovea each side slightly in front of middle, another near the side margin. Elytra 

 very little wider than the thorax, sides nearly straight, slightly divergent poste- 

 riorly, disc convex, each elytron with eight finely elevated costse bearing short 

 setee on their summits, the intervals concave with vague fovese not closely placed. 

 Body beneath and legs rugulose and subopaque. Length .12 inch; 3 mm. 



The ornamentation of the thorax consists of small distant granular 

 elevations which near the sides become more elongate forming short 

 lines. 



One specimen, Arizona. 



O. inductR n. sp. — Form robust, ferruginous, hot shining. Head slightly 

 granulate rugose in front, punctate posteriorly, a slight depression above the base 

 the of antennfe. Thorax more than twice as wide as long, gradually narrower from 

 base to apex, sides nearly straight, margin not crenulate, subapical impression very 

 feeble, median line very indistinctly channeled, a vague depression near the 

 middle of the side close to the margin, surface opaque with short finely elevated 

 longitudinal lines. Elytra finely costulate, the eostte catenulate, intervals con- 

 cave with a single row of barely perceptible large punctures. Body beneath 

 opaque, obsoletely punctate. Length .12 inch : 3 mm. 



