26 J. L. LECONTE. M. D. 



TRICHOTHECA Baly. 



T. Viigans. — Brown, pubescent, with coarse hair of a grayish color, densely 

 punctured. Elytral punctures stronger, arranged in closely apjjroxiraate rows. 

 Antennae testaceous, dai'ker towards the tip. Length 5 mm. 



Texas ; one specimen collected by Belfrage. This insect is undistin- 

 guisliable from our common Xanthonia except by the larger size and 

 thicker front thighs, which are armed with a large tooth. This is another 

 instance of remarkable geographical distribution ; the single species pre- 

 viously known occurs in Northern India. 



GRAPHOPS Lee. 



This genus includes those species, which, unaware of the previous use 

 of the name by Blanehard, I had grouped as Heteraspis (Coleopt. Kan- 

 sas and New Mexico, 23). It seems allied to the Malaysian Scelodonta, 

 but differs by the thighs having no tooth, and by the slender tibite. The 

 characters are in the surface being pubescent, and the head having two 

 deep impressed lines connected in front between the antenn;\; running 

 obliquely backwards and curving around the upper and back margin of 

 the eyes ; there is also a medial line more or less impressed ; in Meta- 

 chroma the lines are in front of the antennae, and are sometimes united 

 between their insertions by a transverse line. The prosternum has a 

 straight outline beneath ; the claws are variable in form and aiford a 

 convenient basis for the separation of the species. The following table 

 expresses the relation between the species : 



Prothorax feebly margined at base; clypeus emarginate 2. 



Prothorax strongly margined at base 3. 



2. — Prothorax finely and densely punctured, elytra punctulate, with stria? of small 

 approximate punctures, becoming obsolete behind; color green, pubescence 

 coarse. Length 5 mm. Kansas berylliiius. 



Prothorax strongly and densely punctured, elytra alutaceous, strife small, ap- 

 proximate, punctures becoming obsolete behind; form more elongate, color 

 blackish green, pubescence coarse. Length 4 mm. Colorado..obscurus. 



Form of beryllinus, prothorax less densely punctured ; elytra punctulate, 

 striae composed of larger, less approximate punctures becoming obsolete 

 behind; color coppery, green, or even blackish. Length 4-4.5 mm. Illinois, 



Texas, Kansas Tarians. 



3. — Clypeus truncate ; pubescence coarse 4. 



Clj^peus emarginate 5. 



4.— Copjjery, thinly pubescent; head strongly punctured, alutaceous, prothorax 

 punctured, at the sides rugose ; elytra punctulate, striae composed of distant 

 larger ones, obsolete behind, sometimes indistinct. Length 4 mm. Middle 

 States; Texas pilbcscens. 



Bronze or coppery, thinly pubescent ; stouter and smaller than pubeseens, the 

 thorax is rugosely punctured over the whole disc, and the elytra are punc- 



