206 ACADEMY OF NATURAL SCIENCES 



oblique than the posterior one ; but as several of these spots are 

 often obsolete or wanting, the bands are not alway to be traced. 

 [This is II. insequalis Weber ; //. Jlavipes Germ, is a synonym. 

 — Lec] 



4. H. CYANEA. — Bluish-violaceous; beneath black ; vertex ru- 

 gose. 



Inhabits Missouri. 



Body above bluish-violaceous : head dusky : vertex with three 

 longitudinal grooves, which attain the base of the antennae: an- 

 tennae black : thorax with confluent, dilated, excavated punctures ; 

 elytra with regular series of large, dilated, punctures : interstitial 

 lines slightly elevated ; serratures of the margin and tip obso- 

 lete ; beneath black. 



Length less than one-fourth of an inch ; male much smaller. 



5. n. COLLARIS. — Thorax red; elytra blue; beneath black. [434] 

 Inhabits Arkansa. 



Head black : antennae, five terminal joints clothed with minute, 

 cinereous hairs : thorax bright rufous, indented on the middle of 

 the base ; punctures much dilated, profound : elytra blue, with 

 regular series of large, dilated punctures ; interstitial lines slightly 

 elevated ; edge distinctly serrated ; beneath black. 



Length less than one-fourth of an inch. 



I found but a single specimen near the Rocky Mountains. 



[A Microrhopala unknown to me. — Lec] 



CASSIDA 



C. UNIPUNCTATA. — Yellow ; margin whitish ; thorax with a 

 black spot. 



Inhabits Missouri. 



Body oval, yellow : head whitish : antennae black at tip : la- 

 brum black : thorax, anterior and lateral margin white : an ab- 

 breviated, black line on the middle : elytra irregularly punc- 

 tured ; margin pale or whitish : beneath black, varied with 

 whitish : feet whitish. 



Length two-fifths, breadth about one-fourth of an inch. 



The form of this species is more oblong than any other of its 

 American congeners; it is also of a larger size than either of 

 them that I have seen. [335] 



[Vol. III. 



