78 GEO. H. HORN, M. D. 



gradually decreasing in length, ninth not longer than second, tenth and eleventh 

 longer, less serrate, the latter slightly constricted at tip. Thorax not longer than 

 wide, slightly broader at base than apex, sides nearly straight, hind angles feebly 

 divergent, carinate, surface not densely punctate, a feeble median line posteriorly, 

 an oblique moderately deep impression on each side at end of carina. Elytra 

 about two and a half times the length of the thorax, shorter than the abdomen, 

 striate, intervals alternately broader, the narrower intervals slightly more convex 

 near the tip, surface moderately densely punctulate and near the tip somewhat 

 wrinkled, apex obliquely prolonged. Prothorax beneath densely punctured at 

 middle, sparsely at the sides, metathorax sparsely and finely punctate. Abdomen 

 shining, very sparsely finely punctulate. Length .56 inch; 14 mm. PI. I, fig. 8. 



The maxillary palpi in addition to the normal four joints have a small, 

 narrow joint at the end of the fourth. The structure of the antenna? 

 above described is also somewhat abnormal, and I observe on one side 

 that the eighth and ninth joints are connate and on the other mobile. 

 The impressions in the thorax near the tip of the carina are probably not 

 permanent in their occurrence, as I observe a variation in this respect in 

 the two females of one Euthi/sanms before me. 



The abdomen beneath is composed of six segments, the last being 

 retractile and the first and fifth equal to the two adjacent ones. From 

 the female of Euthi/aanius this differs in having one less segment to the 

 abdomen and one less (eleventh) joint in the antennae. 



The reference of this female to Aplasfus speratus is not without a little 

 doubt, but from its size, general aspect, locality of occurrence, I think 

 the propriety of the reference will be fully confirmed in the future. 



One specimen, Marin Co., California ; in the cabinet of Mr. Ulke. 



A. optatus 9- — Similar in form and sculpture to the preceding female but 

 with the thorax more nearly square and much more convex. The hind angles 

 liave a short carina and the surface sparsely punctured a little more densely near 

 the anterior angles. The elytra are striate, the intervals convex, the surface rather 

 densely punctulate, and the apex less prolonged. Abdomen as in the preceding. 

 Length .84 inch; 21 mm. PI. I, fig. 7. 



I refer this female to optatus from its size and the sculpture of the 

 elytra, the preceding female is referred to speratus from the very distinct 

 alternation of the elytral intervals. In this female I do not detect the 

 small appendicular piece on the tip of the maxillary palpi nor is there 

 that apparent deformity of the antennas. 



One specimen, in the cabinet of Mr. Ulke. This is the type of 

 Ananiesus convexiroUis Lee. 



FL,ASTOCERUS Lee. 

 This genus was originally described by Dr. Leconte, (Trans. Am. 

 IMiilos. Soc. X, p. 502), on a species from California, P. Schaumi'i, at 

 thi' same time remarking that a " specimen of this insert was sent by 



