52 GEO. H. HORN, M. D. 



The remarks concerning the Cardiophori are made in special reference 

 to Aptopus, a species of which has occured in our fauna. 

 The claws in Aptopus are pectinate. 



Two species are known to me, the following being in brief their 

 diagnostic characters : 



Second and third joints of antennse together distinctly longer than the fourth; 

 basal sulci of thorax very feeble, hind angles not carinate. Thorax square. 



pullatus. 

 Second and third joints of antennte together not longer than the fourth: basal 

 sulci of thorax were marked, hind angles carinate. Thorax longer than wide. 



gracilis. 



E. pullatus n. sp. — General form of a slender Horistonotus, color pale 

 brown, sparsely clothed with short paler pubescence. Head moderately closely 

 punctate. Thorax nearly square or very slightly longer than wide, base slightly 

 broader, apex feebly eraarginate, sides very slightly arcuate, hind angles slightly 

 divergent, not carinate, disc moderately convex, finely not closely punctate, very 

 sparsely pubescent, basal sulci short. Elytra a little wider and a little more than 

 three times the length of the thorax, moderately deeply striate, strife punctured, 

 intervals convex, sparsely punctulate. Body beneath very finely sparsely punc- 

 tulate, finely pubescent. Legs rufo-testaceous. Length .34 inch ; 8.5 mm. 



The general appearance of this insect is that of an elongate Horisto- 

 notus and somewhat that of Athous. 

 Two specimens. Arizona. 



E. gracilis n. sp. — Form rather slender as in Oestodes, color rufo-piceous or 

 brownish, sparsely pubescent. Head very sparsely punctate, front with vague 

 broad depression. Antennae testaceous, second and third joints nearly equal, 

 together not longer than the fourth. Thorax distinctly longer than wide, apex and 

 base equal, the hind angles, however, slightly prolonged and divergent, finely 

 carinate, sides very slightly arcuate, apex very slightly emarginate, basal sulci 

 well marked ; disc moderately convex and shining, finely not densely punctate, 

 sparsely pubescent. Elytra a little wider than the thorax and about three times 

 as long, striate, strise punctured, intervals convex sparsely punctate and very 

 sparsely pubescent. Body beneath finely not densely punctate, a little more 

 coarsely on the abdomen which is also darker in color. Legs rufo-piceous. Length 

 .28 inch ; 7 mm. 



This species is smaller and more slender than the preceding and differs 

 more especially in the characters given in the tabular comparison. Its 

 form is not only like Oestodes but still more like Aphricus, and the 

 species superficially is so difficult to distinguish from the latter, that 

 before a closer examination I had supposed them to be identical. 



Occurs in New Mexico. 



