258 GEO. H. HORN, M. D. 



This species has two characters which will enable it to be easily 

 known. The ])unctnres of the striai at base are trnly confused and 

 extend in this condition to the unibone, forming from this a triangle 

 to the middle ; the sides of the elytra are opaque, while the disc is 

 shining. In general outline the form is not unlike deniicuhda. 



Occurs in Minnesota and at Veta Pass, Colorado (cab. Schwarz). 



3. C irregularis Lee — Ohlong oval, convex, not twice as long as wide, 

 jiiceous, surface distinctly bronzed, feebly shining. Head moderately closely 

 punctate and distinctly alutaceous. Antennse piceous, three basal joints pale. 

 Thorax very nearly twi(-e as wide at base as long, sides regularly arcuately nar- 

 rowed to apex, basal marginal line distinct at the sides, surface rather coarsely 

 and closely punctate, a little finer near apex, distinctly ahitaceous. Elytra wider 

 than the thorax, humeri rounded, form regularly oval, disc with rows of coarse 

 punctures closely placed, those of the scutellar and first three discal stria} ir- 

 regular from base oue-third to apex, outer strite imiiressed and serrately punctate, 

 intervals smooth, wider than the stride, the outer ones slightly convex, the in- 

 flexed border of the elytra with numerous punctures; surface not distinctly 

 ahitaceous. Body beneath piceous, slightly bronzed. Prosternum densely and 

 coarsely punctate, the side pieces sparsely punctate. Abdomen sparsely, moder- 

 ately, coarsely punctate. Femora piceous, tibiae and tarsi rufotestaceous. Length 

 .08 inch. ; 2 mm. 



An easily known species and readily separated from all the (others 

 w ith irregular striae by the characters given in the table. 



After an examination of the type of rxidis Lee. it proves to be a 

 variation with the striae a little less irregular. It has been unfortu- 

 nately compared \\\i\\ cribrcda. 



A variety in Mr. Ulke's collection has the striae much more con- 

 fused than the typical form, the irregularities extending to the hu- 

 meri and eveu beyond tlie middle. By the table this form might be 

 considered to be cribrcda, but in this the sides of the elytra are opaque. 



Occurs in California from San Jose northward to Oregon, Nevada 

 and Michigan. 



4. C'. siibeyliiirtrica Lee. — Oblong, nearly parallel, more than twice as 

 long as broad, piceous, surface with seneous bronze lustre. Antennae piceous. 

 three basal joints paler. Head ahitaceous, punctures not coarse nor closely 

 idaced, a smooth median space, front not densely punctured. Thorax about 

 one third wider than long, widest at middle, apex not narrow, sides rather 

 stiongly arcuate, disc convex, a slight depression along the base, punctures mod- 

 erately coarse and close, coarser along the sides and base, surface not distinctly 

 ahitaceous. Elytra a little wider at base than the thorax, humeri rounded, 

 umbone scarcely i)roniinent, disc willi rows of moderately coarse punctures 

 closely placed, but not serrate, the scutellar and first two discal striae irregular 

 at base, outer strife not impressed, intervals not convex, wider than the striae 

 and smooth, epipleural fold with numerous punctures, biseriate at base. Pros- 



