136 GEO. H. HORN, M. D. 



SILPHID.E. 



ECHINOCOI.EUS n. g. 



Form convex, oboval, narrower behind. Head us in Choleva. Antenuse short, 

 almost entirely glabrous, last joint pubescent at apical half; first joint cylindrical, 

 narrower at base, second oval, joints 3-11 gradually wider, those from 3-8 gradu- 

 ally shorter and more transverse, eighth as wide as the seventh and ninth and a 

 little shorter, joints nine and ten nearly equal, as wide as long, eleventh longer, 

 oval at tip. Maxillary palpi with last joint elongate conical as long as the pre- 

 ceding joint. Middle coxse slightly separated, the mesosternum not carinate; 

 posterior coxse contiguous. Tibiae spinulnse externally, spurs slender and moder- 

 ately long. 



The genus for which the above name is proposed is closely related to 

 Choleva, and differs especially in the form and structure of the antennae. 

 In this respect it resembles Cntopomorphvs, from which it differs by 

 the non-carinate mesosternum and the form of the terminal joint of the 

 palpi. 



E. setiger n. sp. — Broadly oboval, narrower behind, pale castaneous, feebly 

 shining. Head finely punctulate, sparsely finely pubescent, with short, semi-erect 

 setae intermixed. Thorax very transverse, more than twice as wide at base as 

 long, apex subtruncate, sides arcuately narrowing to the front, base broadly emar- 

 ginate, the hind angles rectangular not prolonged, surface extremely finely punc- 

 tulate and with fine brownish pubescence, with semi-erect setae intermixed. 

 Elytra as wide at base as the thorax, sides rapidly arcuately narrowing to the 

 apex, the two apices conjointly rounded, sutural stria distinct, abbreviated in 

 front, surface minutely punctulate, the punctures arranged in strigae slightly ob- 

 lique, surface finely pubescent with short semi-erect not closely placed setae ar- 

 ranged in about eleven series on each side. Body beneath sparsely punctate with 

 coarser pubescence than above. Length .11 inch ; 2.75 mm. 



This species resembles in form Ptouiaphagus brachyderus (Trans. Am. 

 Ent. Soc. 1880, PI. V, fig. 16), but is more arcuately narrowed posteriorly. 

 Two specimens, Arizona. 



CHOEEVA Latr. 



C alsiosa u. sp. — Oblong, rather slender, piceous, subopaque, elytra slightly 

 fuliginous. Head rather coarsely but not closely punctate, finely pubescent. An- 

 tennae rather slender, longer than the head and thorax, piceous, the two basal 

 joints somewhat paler. Thorax less than twice as wide as long, narrower in front, 

 sides moderately arcuate, hind angles not rectangular, rather obtuse, surface 

 slightly shining, moderately densely and finely, sub-muricately punctured and 

 finely pubescent. Elytra elongate oval, as wide at base as the base of the thorax, 

 gradually narrowing to apex, sutural stria fine abbreviated at base, surface opaque 

 moderately densely punctate and finely pubescent, the punctures coarser than the 

 thorax. Body beneath moderately closely punctate, finely pubescent. Legs pice- 

 ous, tips of tibia and tarsi rufesceut. Length .16 inch ; 4 mm. 



Male. — First three joints of the anterior tarsi and the first of the middle dilated. 

 Under side of front femora flattened, slightly longitudinally concave, without 

 tubercle. 



