NORTH AMERICAN COLEOPTERA. 195 



lias simple antennas and lacks the sensitive oval patch on 

 the declivity of the vertex. 



R. dcformata Lee. — Three specimens of this species were 

 taken at Paraiso Springs, Monterey Co. The antenna is 

 figured on the plate; the abnormally large second joint is 

 excavated and coarsely punctured beneath. 



SONOMA n. geu. (Euplectini.) 



The following genus belongs near Faronus and Sagola, 

 with apparently much greater resemblance to the latter. 

 The species thus far described belong to the Pacific Coast 

 fauna, and were placed by Dr. LeConte in Faronus. The 

 diagnosis may be given as follows, the general characters 

 being those of the Euplectini. 



Posterior coxse contiguous; tarsi with two equal claws. Autennfe rather 

 distant at base, feebly but distinctly clavate; first joint much longer than the 

 second. H-^ad slightly smiller than the prothorax, with three nude fovefe 

 not connected, the two posterior small, the apical large and very deep; geans 

 not at all prominent, rounded. Prothorax with two small discal fovere before 

 the middle, a very large, deep, widely dilated basal fovea, and one at eacli 

 side not connected. Elytra with sutural striae; discal deep and broad, short, 

 basal. First segment of the abdomen very short, shorter than the second or 

 third, coriaceous above, corneous beneath, without basal carina?; second seg- 

 ment having an apical transverse line of finely spongiose sensitive surface 

 which is interrupted in the middle. Tarsi rather short. Eyes well developed. 

 Body very depressed, linear. 



The head is not carinate beneath, but has a deep trans- 

 verse groove just behind the mentum and maxillae. The 

 elytra are much longer than the prothorax, depressed. The 

 flanks of the elytra are norm d. The middle coxae are sub- 

 contiguous, separated by a very narrow carina. 



The genus Sonoma is distinguished from Faronus by the 

 form of the geniB and the short basal segment of the abdo- 

 men; from Sagola Sharp it differs in its less approximate and 

 less prominent frontal tuberculations, and especially in the 

 structure of the antenn^Te, which are in Sagola not at all clav- 



