114 CUliCULlONID^. 



[LeConte. 



the base of the mandible is visible on the outer side, the beak is short, 

 feroad. flat, and emarginate at tip. The antennal grooves extend forwards 

 quite to the base of the mandibles ; they are short and curve abruptly 

 downwards behind the insertion of the antennae, which are geniculate, 

 with elongate annulated club covered with sensitive surface. The eyes 

 are small, rounded, convex, and rather finely granulated. The front coxae 

 are contiguous and prominent, the hind coxfe widely separated and extend 

 to the side margin ; the tibia? truncate at tip, without terminal hook. 

 Tarsi dilated, spongy beneath ; claws slender, simple, divergent. The 

 ventral segments are not very unequal, and the sutures are nearly straight. 

 The side pieces of the mesothorax are diagonally divided, and the epimera 

 do not largely attain the prothorax ; those of the metathorax are narrow, 

 and suddenly dilated in front. 



SITONES Sch. 



A few species of this well-known genus occur in our fauna, and as will 

 be observed below, several of them are also found in Europe. They may 

 be tabulated as follows : 



Setae of elytral interspaces very obvious 2. 



Setae of elytral interspaces not, or feebly visible 4. 



2. Eyes not prominent 3. 



Eyes convex prominent, elytra tesselated 1. lineellus. 



3. Elytra tesselated 2. californicus. 



Elytra uniform dirty brown 3. sordidus. 



Elytra striped with pale 4. vittatus. 



4. Frontal groove deep 5. 



Frontal groove fine, color uniform brown 5. flavescens. 



5. Elytra gray with broad white stripes 6. tibialis. 



Elytra gray without stripes, form narrower 7. crinitus. 



1. S. lineellus Gyll., Sch. Cure, ii. 111; Allard, Ann. Ent. Soc. Fr., 1864, 

 354; CurcuUo lin., Bons., Cure. Suec. ii, 30, f 18, et auctorum Europ. ; 

 S. indifferem Say, Cure. 10; ed. Lee. i, 269 ; S. scissifrons Say, ibid. 



Kansas two specimens. I have not copied the European synonymy, 

 which may be found in Schonherr. It varies greatly in size, the larger 

 specimen being 7.5 mm. long. 



2. S. californicus Fahr., Sch. Cure, vi, 267; Mannh., Bull. Mosc. 

 1843, ii, 289; S. calif ornim (err. typ.) Allard, Ann, Ent. Soc. Fr. 1804, 

 370. 



California and Oregon, abundant. This species also varies in size from 

 f6.3 to 4.2 mm. 



3. S. sordidus Lee, Pac. R. R. Expl. and Surveys, Entom. 54. 

 California, San Francisco and St. Diego. Closely allied to the preceding 



and perhaps only a race of the same species. The form is a little less elon- 

 o-ate, the prothorax more rounded, and the scales of a uniform dirty l)rown. 



4. S. vittatus Lee, Pac. R. R. Kxpl. and Surveys, Entom. 54. 



San Francisco, California. Also closely allied to S. californicus, but the 



