Horn.] ''^^ [June 20, 



Broadly oval, convex, black, feebly shining, rather densely punctured. 

 Elytra with four dorsal striie, the first and second apical, third and 

 fourth basal. Pygidium and progygidium densely punctured, the former 

 vertical. Thoracic and elytral margins continuous, and on both members 

 slightly reflexed. Length .08-. 10 inch; 2-2.5 mm. 



This insect though not very common is contained in nearlj^ all the 

 collections, and may be readily known from all our Ilisteridaj by the 

 generic characters, and the above short extract. 



Occurs from Maryland to Texas and Illinois. 



T. ealifornicus, Horn, Trans. Am. Ent. Soc, 1870, p. 1, pi. 1, fig. 11. 



Broadly oval moderately convex, feebly shining. Head and thorax 

 coarsely but sparsely punctate. Elytral margin continuous with the 

 thoracic and acute. Elytra with three entire fine raised line«, and a 

 fourth abbreviated, extending from base to the middle of the elytra. In- 

 tervals obsoletely punctured. Body beneath sparsely punctate. Legs 

 pale reddish-brown. Length .06 inch ; 1.5 mm. 



Occurs near Sacramento, California. 



Notwithstanding the dissimilarity of this species and the preceding, I 

 cannot find it generically different, even with the difierence in the posi- 

 tion of the pygidium. 



T. Icumgatus, Payk. {Icevissimus Lee), is West Indian and South 

 American. Its reference to the United States is doubtless erroneous. 



ONTHOPHrLXJS, Leach. 



Autennje inserted on the front immediately in front of the eyes. Club 

 oval, annulate. Antennal fossa under the margin of the thorax behind 

 the anterior angle, deep and closed in front, open beneath. Tibia3 slen- 

 der, the anterior finely denticulate. 



Two species only are known in our fauna. 

 Thoracic carinse feeble, elytral carina3 equal, pygidium shin- 

 ing, surface even without carinas Lecontei. 



Thoracic carinfe strong, elytral carinjie uneqal, pygidium and 

 propygidium opaque, and with elevated lines alternatus. 



O. Lecontei, Horn, Trans. Am. Ent. Soc, 1870, p. 138, pi. 1, fig. 10. 



Broadly oval, black, moderately shining. Head densely punctured, 

 V-shaped carina feeble, front slightly concave. Thorax twice as wide 

 at base as long, at apex broader than the length, sides gradually arcuate 

 from base to apex, margin slightly reflexed ; disc densely punctured, 

 shining with six feeble carinte, the middle two beginning at the apical 

 margin, but not attaining the base, the second slightly abbreviated at 

 apex and base, outer carinas arcuate and abbreviated at apex and base ; 

 the four middle carinaa nearly equidistant. Elytra with six dorsal and a 

 marginal entire carinas, carinie moderately elevated, intervals finely 

 tri-carinulate, the middle carina of each interval interrupted by a row of 

 coarse punctures. Epipleuras coarsely punctured shining, limited above 



