152 A. MATTTIF.WS. 



Thorax moderate, rather broader, but not longer than the head, widest behind the 

 middle, rather contracted towards the base, very convex and shining, marked 

 throughout with deep, remote foveae; sides slightly margined, basal margin 

 nearlv straight, with the angles rather obtuse. 



ScaTKLLUM very large, triangular, marked with deep, remote fovefe. 



Elytra oval, widest before the middle, rather longer and wider than the head and 

 thorax, convex and shining, marked throughout with deep, distant, irregular 

 foveolate punctures; sides slightly margined, apex obtuse, paler. 



Legs moderate, dark yellow, with the femora dusky. 



Undbr parts wholly castaneous. 



DiiFers from Pt. Lawsoni in its smaller size, less convex form, deeper 



and more distant punctures. 



Hah. — North America, found by Mr. TTlke in District of Columbia. 

 Ohs. — This species belongs to the foveolate section of the genus, rep- 

 resented in Europe by Pt. punctafmn. and in Australia by Pt. Lavmni. 



]fIOTiiiCHUL,S K I r]?I. 



Matthews Trich. Illust. p. 72. 1872. 



Body elongate, oval. 



Head rather large, sessile. 



Antennae 11-jointed, 9th joint scarcely incrassated, 10th rather larger, 



11th much larger than the 10th. 

 Pronotum quadrate, sides sinuated. 

 Elytra entire, rather long, epipleura very broad. 

 Mesosternum short, carinated for its whole length. 

 Metasternitm sub-quadrate, not reaching the sides of the body. 

 Venter with six segments. 

 Legs moderate, tibiae dilated, tarsi short, robust, with the basal joints 



elongate and incrassate. 

 Posterior coxyE contingent, narrowly laminated. 



M. siniiatocolle Matthews Trich. Ilhist. p. 74, 1S72.— L. c. U mm. — Elon- 

 gate, ovate, convex, fuscous black, covered with short silvery pubescence, coarsely 

 punctate ; head rather small ; eyes moderate ; thorax large,-sub-quadrate, slightly 

 constricted near the base, deeply punctured, longer and wider than the head, 

 widest before the middle; sides sinuated, posterior angles obtuse; elytra ovate, 

 rather wider and half as long again as the head and thorax, widest before the 

 middle, deeply punctured, with the interstices rugose, apex broad, rounded ; legs 

 and antennse rufous yellow. 



United States. I found a mutilated specimen of this remarkable 

 species in the collection of Dr. LeConte, several others were subse((uently 

 taken by Mr. Crotch in California. 



