42 PROCEEDINGS OF THE ACADEMY OF 



broadertlian long, sides much deflexed, rounded, narrowed behind, 

 evidently punctate; elytra red, suture broadly black; striate 

 punctate, ten striae visible at the base; the sixth interstice with 

 a few punctures, eighth broad, with a supplementary stria inclosed 

 in it. L. .13-.22. Atlantic region, Texas. 



^ Last ventral segment with a smooth medial line. 



5. M. interruptum (Say), J. Acad., iii. 448. 



Oblong, reddish-brown (varying from yellowish-red to black 

 beneath) ; head coarsely punctate, labrum prominent, hardlj' tri- 

 dentate in front ; thorax broader than long, disk sparinglj^, sides 

 closely punctate; front angles auriculate, sides strongly rounded, 

 hind angles A'ery obtuse, color red, with the discal third red 

 or black ; scutellum alutaceous with a few visible punctures ; 

 eh'tra yellowish-red (or with an interrupted dorsal vitta and the 

 suture black), punctate striate, the external strioe quite confused, 

 interstices irregularly and very sparingly puuctulate; ventral seg- 

 ments sparingly punctate and pubescent, hind angles of thoracic 

 epipleurae punctate. L. .22. Kansas (Leconte). 



6. M. peninsulare, sp- n. 



Near M. ustun\ in color and shape, but thorax closely and 

 densely punctate, head coarsely punctate, the tubercles above the 

 antennte but little marked ; thorax with the sides steeply deflexed, 

 broadly rounded ; scutellum alutaceous, with four or five punc- 

 tures; elytra punctate striate, the striae as in suturale; thoracic 

 epipleura3 punctate at the hind angles. L. .20. California (Le- 

 conte). 



Closely allied to the preceding, but distinct from all by the 

 densely punctate thorax, fi'om suturale and ustum by the punc- 

 tate epipleura?, from interruptum by the regular strire. 



7. M. quercatum (Fabr.), Syst. El., i. 507, pnnctkolle, Leo. Pr. Acad., 1858, p. 85. 



Reddish-brown or black, variable ; head almost smooth, front 

 even ; thorax densel}'^ rugoscly punctate, sides steeply deflexed, 

 strongly rounded ; elytra finely alutaceous, rather obsoletely and 

 irregularly punctate striate; thoracic epipleurjc smooth. L. .12- 

 .20. Middle and Southern States, Texas. 



Olivier's description of C. quercata shows that it refers to this 

 insect. 



