234 [January, 



rior angle is another similar tubercle. The elytra are coarsely punctured, 

 slightly truncate, but not armed at tip ; they hjiVe each four small polished lines 

 associated by pairs, but not united, the outer basal one is very small ; the inner 

 one of the posterior pair, which is placed about the middle, is smaller than the 

 outer. 



Physocnemum Huld. 



P. araethystinum, nigrum, thorace transverso, lateribus valde rotun- 

 datis, basi brevissime tubulato, disco confluenter punctato, irregulariter calloso, 

 elytris laBte violaceis, nitidis, confertim punctatis, femoribus non clavatis. 

 Long. '75. 



This species has a general resemblance in appearance to P. Proteus, but differs 

 from all the species known to me in having the anterior as well as the posterior 

 thighs simple ; the thorax is narrowed in front, rounded on the sides, suddenly 

 narrowed towards the base, which is slightly tubulate; the sides are very 

 densely and confluently punctured, the disc less densely so, with three indistinct 

 smooth longitudinal elevations. The elytra are shining violet blue, finely and 

 densely punctured, the punctures becoming larger and less dense towards the 

 base. 



One specimen was found at Sacramento, California, by Mr. J. Childs, and 

 given me by Mr. Rathvon. 



A Callidium from the same collection is very similar to the female of C an- 

 tennatum, but the thorax is more densely punctured; I can otherwise discover 

 no difference. 



Cacoplia Lee. 



Having, since the publication of my essay on Longicornia, obtained, through 

 the kindness of Mr. Haldeman, the original specimen of his Saperda 'ptdlata, I 

 have convinced myself that it must be referred to this genus, proposed by me in 

 the Journal of the Academy (New Ser. 2, 149.) The following diagnoses will 

 enable the two species at once to be distinguished : 



1. C. pull at a, fusco-testacea, brevissime densius sordide pubescens, thorace 

 parce punctato, linea dorsali postice glabi-a, elytris thorace latioribus cylin- 

 dricis parce minus distincte punctatis. Long. -68. 



Saperda pullata Hald., Trans. Am. Phil. Soc. 10, 55; Lee. Journ. Acad. Sc. 

 2,163. Alabama, Haldeman. One specimen. 



2. C. p ruin OS a, testacea, brevissime cinereo pubescens, thorace obscu- 

 riore, sat dense punctato, linea dorsali postica glabra, elytris thorace latioribus, 

 cylindricis, distinctius parce punctatis. Long. '47. 



Lee. Journ. Acad. Nat. Sc. 2, 149. 



Hebestola nehiilosaX Haldeman, Tr. Am. Phil. Soc. 10, 54. 



New York. One specimen. 



MoNiLEMA Say, 



i\. M. a r m a t u m, elongatum, nigrum, thorace laevi, lateribus acute spinosis, 

 apice et basi punctis marginato, elytris subrugosis, parce grosse punctatis, apice 

 Isevibus, dorso convexis, lateribus subito declivibus. Long. 1-25. 



Mexican Boundary, collected as before mentioned. This species is similar to 

 M. semipunctatum Lee (Journ. Acad. Nat, Sc. 2, 2, 167,) but the form is 

 more elongate, the thorax is smooth on the disc, and the elytra are more punc- 

 tured and rugous. 



2. M. c r a s s u m, breviusculum, nigrum, thorace lateribus subtuberculato, 

 disco opaco parce punctato, margine postico punctato, elytris convexis, subru- 

 gosis minus dense variolosis, apice laevibus. Long. '8. 



With the preceding. This species is similar to M. a n n u 1 a t u m Say, but is 

 stouter in its form. The elytra are much more coarsely punctured, the punc- 

 tures extend further along the epipleurae and suture, than along the disc ; the 

 elytra are very convex, the sides descend more abruptly than in M. annulatum, 

 but less so than in M. armatum. 



