AMERICAN COLBOPTERA. 263 



one extends across the Continent, the others are confined to the 

 Atlantic region. 



Pt. con!<iobrinils Lee. (Catops). — Form oblong-oval, somewhat cuaeiform 

 or IMordella-like, brownish or pioeous, feebly shining, pubescent, legs and 

 antennae at base paler. Head sparsely punctulate, pubescence radiating. Thorax 

 one-third wider at base than long, slightly narrowed in front, sides feebly 

 arcuate, base slightly arcuate, hind angles acutely rectangular, surface entirely 

 transversely strigose. Elytra gradually narrowing, sides very feebly arcuate, 

 apex suddenly obliquely narrowed, sutural angle not prominent, sutural stria 

 moderately deeply impressed, surface very obliquely strigose. Body beneath 

 moderately densely punctulate, femora strigose. Middle and posterior tibiae 

 fimbriate at tip with short equal spiuules. Length .08 — .12 inch; 2 — 3 mm. 

 (PI. V, fig. 15). 



This species varies a little in color by having the elytra paler than 

 the thorax. Some specimens have the strigosity a little less oblique 

 near the tip but no other diflFerences are observed. 



This is our most widely distributed species being found from 

 Michigan to Florida, Texas, Arizona and California, (Owen's Valley). 

 It does not appear to occur in the maritime regions of the Pacific. 



Pt. californicus Lee. (Catops). — Brownish or pieeous, pubescent, closely 

 resembling consobrmus but a little more oval, the sides of the elytra more 

 arcuate and the surface transversely and more finely strigose. Middle and 

 posterior tibiae fimbriate with short closely placed equal spinules. Length 

 .10— .12 inch; 2.5—3 mm. 



This species is the representative of the preceding in the maritime 

 regions of California, extending from San Diego northward. 



Pt. nevadicus n. sp. — Brownish-pioeous, subopaque, pubescent, oval, 

 slightly oblong, subdepressed. Head finely punctulate, pubescence radiating. 

 Antennae pieeous, four basal joints and tip paler. Thorax nearly twice as wide 

 at base as long, sides feebly arcuate and gradually narrowed to the front, base 

 slightly sinuate each side, hind angles slightly prolonged, surface very finely 

 and densely strigose. Elytra gradually narrowing, sides very feebly arcuate, 

 tip obliquely subtruncate, sutural stria moderately deeply impressed, surface 

 very densely and finely strigose. Body beneath finely punctulate. Femora 

 finely strigose, tibiae fimbriate at tip with short equal spinules, the inner 

 spur of the posterior tibia a little longer than half the first joint. Length 

 .12 inch ; 3 mm. 



Abundantly distinct from the two preceding species by its more 

 depressed form and the very dense and fine strigosity of the surface, 

 which requires a moderate power to be seen. 



One 9 specimen from western Nevada, collected by H. K. Morrison. 



Pt. oblitns Lee. (Catops). — Brownish or pieeous, feebly shining, pubes- 

 cent, form oval, slightly oblong, equally narrowed. Head sparsely punctate. 

 Antennae pieeous, basal joints paler, eighth joint much shorter and narrower 

 than the ninth. Thorax twice as wide as long, feebly narrowed to the front, 

 sides slightly arcuate, base arcuate, hind angles obtuse, surface punctured with 



