448 REVISION OF THE ELATERID^E 



Two specimens, San Diego, California. Although differing slightly in the form of the 

 front, and in the smaller size of the fourth tarsal joint, this species is so exact a miniature 

 of C. pyrrhos, that it cannot be separated as a distinct genus. 



Body dark fuscous, covered with fine short brownish gray hair; head densely punctured, 

 deeply concave, Avith the lateral margins indistinctly uniting at tip; eyes prominent. An- 

 tenna) half as long as the body, second joint small; the following ones compressed, elon- 

 gate, very slightly triangular, the third not quite as long as the fourth, the eleventh hardly 

 acuminate. Thorax more than one-half longer than wide, sides straight, except at the 

 apex, where they are very slightly rounded; posterior angles elongate, acute, slightly di- 

 verging, carina sharp, near the lateral margin; disc densely and coarsely punctured; 

 elytra parallel, rounded posteriorly, stria? fine, subpunctulate, interstices very slightly con- 

 vex, rugosely punctulate, especially near the stria?; beneath somewhat paler, legs almost 

 testaceous, tarsi with the first joint decidedly longer than the second, and with the fourth 

 joint one-half as long as the third. 



B. 



46. C. insidiosus, aeneo-niger, longiusculus, cinereo-pubescens, thorace minus convexo, angulis 

 anticis foveatis, quadrato, lateribus par'allelis antice rotundatis, angulis posticis angustis, acutis cari- 

 natis divergentibus, minus dense punctulato, subcanaliculato, elytris densius punctatis, testaceis, ob- 

 solete striatis, antennis vix serratis piceis, articulis 2 et 3 sequalibus sequente coniunctis longioribus, 

 ano pedibusque fusco-testaceis. Long. "45. 



Lake Superior, rare. Avery easily distinguished species, of a somewhat elongate form, 

 with the elytra slightly obliquely attenuated behind the middle. The first joint of the 

 tarsi is hardly longer than the second. 



47. C. falsificus, ceneo-niger, elongatus cinereo-pubescens, thorace latitudine longiore, con- 

 vexiusculo, lateribus rectis parallelis apice rotundatis, angulis posticis parvis divaricatis non carinatis, 

 subtestaceis, disco subtiliter punctato, subcanaliculato, elytris testaceis, tenuiter striatis, interstitiis 

 dense punctatis, sutura infuscata, pedibus testaceis, antennis piceis, vix serratis, basi testaceis, articu- 

 lis 2 et 3 sequalibus coniunctis 4 to longioribus. Long. "3 — "35. 



In form closely resembles the preceding, but the smaller size and non-carinated angles 

 of the thorax distinguish it: the thorax at the apex is indistinctly margined, and somewhat 

 impressed near the angles: the first joint of the tarsi is conspicuously longer than the 

 others. 



In case the small spongy tuft at the tip of the tarsal joints should not be considered of 

 sufficient importance to warrant the grouping of the species here adopted, the natural 

 position of this and the preceding species would be in Div. (2,) in the same group with 

 C. i n flatu s, forming the transition between that in C. rotundicollis. 



4!S. C. m en dax, piceo-seneus, elongatus, cinereo-pubescens, thorace latitudine longiore, con- 

 vexo, ad apicem utrinque transversim impresso, lateribus ante medium rotundatis, angulis posticis 

 carinatis divergentibus, confertim punctato, subcanaliculato, elytris striis punctatis, interstitiis planis 

 rugose punctulatis, antennis nigris, vix serratis, articulo 3'° 2"' !o paulo longiore, coniunctis 4'° longio- 

 ribus, pedibus piceis. Long. -41. 



One specimen, Lake Superior: has the appearance of Limonius, but the front is not 



