138 GEORGE H. HORN, M. D. 



in front, sparsely punctured, side pieces and first abdominal segment coarsely 

 punctured. Pygidium inflexed, coarsely punctured. Legs piceo rufous. Length 

 .07 inch; If mm. (Entire length). 



Notwithstandin-^ several of the characters above given the species is 

 placed ia Tri/jalus, from the position of the antennal fossae, the inser- 

 tion of the antennae and the form of the club. The inflexed pygidium 

 has an analogue in Isevissimus, Lee. The elytral sculpture is peculiar 

 and recalls Onthophilus, from which however it differs in its very dis- 

 tinct and prominent prosternal lobe. The disc of the elytra (the por- 

 tion between the two inner ridges, shows rows of fine punctures which 

 show a tendency to become striae. The sutural row is entire and not 

 striate, the next inner row is striate at base, arched, uniting with the 

 sixth row which is also striate and extends in form of stria nearly half 

 the length of the elytra ; the fifth row also becomes slightly striate at 

 its apical portion. Between the inner short ridge and the next inner 

 stria are moderate punctures arranged more regularly biseriately than 

 those between the costae. 



An unique specimen of this insect was sent me by Mr. H. Edwards, 

 of San Francisco, by whom it was collected in the neighborhood of that 

 city. 



ONTHOPHILUS, Leach. 

 0. Lecontei, n. sp. — Broadly oval, moderately convex, black, shining. Front 

 coarsely punctured, anteriorly variolose, feebly triangularly elevated and with 

 a short, faint carina at vertex. Thorax densely and coarsely punctured, nearly 

 twice as broad at base as long, sides feebly rounded, gradually narrower to the 

 front, margin smooth, and thiclsened, apex feebly emarginate, base broadlv 

 rounded; disc with six elevated lines, the central pair attaining the apex, but 

 not the base of thorax, the next outer abbreviated at each end, the outer costse 

 stronger, attaining the base and slightly curved outward toward the basal angle. 

 Elytra scarcely broader than the base of thorax, disc feebly convex and with 

 seven rather strongly elevated costse, interstices finely bicarinate and with a row 

 of distant coarse punctures, margin inflexed, sinuous and carinate. Propygi- 

 dium convex, slightly more elevated along the middle, coarsely punctured. 

 Pygidium coarsely punctured, oval, oblique. Prosternura coarsely j^unctured, 

 slightly concave. Mesosternum very coarsely punctured, variolose. Length .16 

 inch ; 4 mm. 



This species is our largest and is more regularly oval and less con- 

 vex than any other of our species. The head is much less distinctly 

 triangularly carinate, the converging ridges being almost obsolete in 

 front; the carina of the vertex is also very faint. The thorax is 

 broadest at base, gradually narrowing to. apex and with feebly rounded 

 sides. The outer carina of the disc is much stronger and attains the 

 basal margin of the thorax. Tlie elytra have seven distinct costae 

 on the disc without the sutural elevation. Between the costa) the in- 



