40 CALIFORNIA ACADEMY OF SCIENCES. 



longer than wide, two and one-half times as long as the prothorax, very finely, 

 sparsely, feeblj^aud irregularly punctate; punctures asperate. Pj^gidium wider 

 than long, feebly convex, finely and rather sparsely punctate, moderately 

 sparsely and evenly covered with short slender squamose pubescence. Poste- 

 rior tar-i short, two-thirds as long as the tibias; claws moderate, having a small 

 erect acute tooth interiorly near the base. Length 19 mm.; width 8.5 mm. 



California (San Diego Co.), also probably Lower Cali- 

 fornia. 



Five or six sj)ecimens were taken by Mr. G. W. Dunn, 

 and I have received tlie present specimen through the kind- 

 ness of Mr. W. G. W. Harford. 



This species differs from sc/uamicolUs, Lee. in almost every 

 character given by Dr. LeConte in the original description 

 of the latter (Journ. Phil. Acad. HI, Nov. 1856, p. 225). 

 It may, however, perhaps be best to call special attention 

 to the more salient differences. These are the size, squami- 

 collis being one-third longer, and the form and vestiture of 

 the head and prothorax, the latter in marginafa, having no 

 sign of a median channel, with the surface not impressed 

 toward the anterior angles, and having the punctuation ex- 

 tremely sparse near tlie sides of the pronotal disk. The 

 scutellum in marginata has no glabrous line, and the pygi- 

 dium is rather sparsely squamose. If .^qaainicollis possessed 

 three prominent lines of scales upon the pronotum. with the 

 surface elsewhere almost entirely free from them, or if it 

 had three distinct lines of slightly denser pubescence upon 

 each elytron, it is to be presumed that such striking charac- 

 ters would have been mentioned by Dr. LeConte; this 

 purely negatives evidence alone, therefore, is almost conclu- 

 sive proof of the specific distinctness of iuarginata and of 



its validit3\ 



V. 



EERATA. 



Several errors occurring in thj paper published by me in the preceding vol- 

 ume of this Bulletin require correction, as follows: 



Page 'iOD — jth line from bottom, for "Colodera" rad "Calodera." 

 Page 3:1 - 1st line of descr., for '"L. longipennis" re id "V. longipennis." 

 Page 327 — 10th and 15tli lines from top, for " Horniariim" rend " Honii- 

 anum." 



