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North American Coleopterous Insects. 



179 



strlce^ which are obsolete on the humerus ; interstitial 

 lines depressed, with minute punctures furnishing hairs. 



Length over one fifth of an inch. 



A rare insect; I have found but one specimen, which 



is probably a female. 



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cornis, Nob., and in form more like the lazarus, Oliv. 

 than the cejjlius, Oliv. 



Tkox, Fabr. 



4 



1. T. alternatus. Elytra with cinereous, elevated 

 lines interrupted by black spots. 



Inhabits United States. 



Body black, or black slightly tinged with brown: 

 head bituberculate : thorax with obtuse, elevated, inter- 

 rupted lines, irregularly punctured ; posterior angles ob- 

 tusely dentate : scutel, posterior margin cinereous : elytra 

 striate with dilated punctures ; alternate interstitial hnes 

 more elevated, cinereous, interrupted by black spots. 



Length over half an inch. 



This species is readily known by the cinereous and 

 black alternation of the more elevated interstitial spaces. 

 A variety occurs of which the elytral punctures are 

 muoh less dilated, and the thorax is less deeply sculp- 

 tured. I have found the species in Pennsylvania ; 

 Nuttall obtained it in Arkansaw, and Uv. Barabino sent 

 me an individual taken near New Orleans. 



A label attached to a specimen in my cabinet states 

 that it cannot be the crendtus, OUv., with which I am 



now unacquainted. 



2. T. glohosus. Blackish-bronze ] elytra denticulated 



on the lateral edge* 

 Inhabits Pennsylvania. 



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