340 [December, 



be made use of in dividing; the genus. Those, however, which have only the 

 exterior ungues of the two posterior pairs toothed nnay form a separate section. 



a. Ungues posteriores extcrni dente basali armati. 



1. T. rotundicollis. Cantharis rotundicolUn Say. J. Ac. Nat. So. 

 5, 165. Rare throughout the Atlantic slope of the United 8tates. 



2. T. C u r t i s i i Kirby. F. Bor. Am. 4, 246. Lake Superior. 



3. T. tibialis, rufo testaceus, cinereo-pubescen?, thorace transverso 

 marginato, subcanaliculato versus basin siibangustato, elytris fuscis, subtilissime 

 scabris, tibiis tarsisque obscuris, antennis fuscis basi rufis. Long. "75. 



California, ^an Diego. This fine species differs from the preceding by its 

 broader thorax; the head is immaculate; the abdomen is a little darker than 

 the pectus. 



4. T. censors, rufo-testaceus, cinereo-pubescens, thorace longiusculo, 

 marginato, subcanaliciiiato, versus basin subangustato, elytris fuscis subtilissime 

 scabris, tibiis tarsisque obscuris, antennis fuscis basi rufis. Long. -S?. 



California, San Diego; only differs from the last by its long thorax; the 

 margin in front is broad, and the apex rounded. 



5. T. 1 a u t u s , niger, cinereo-pubescens, ore pedibus thoraceqne laste 

 flavis, hoc quadrate, antrorsum subangustato, undique anguste marginato, elytris 

 scabris, substriatis. Long. -3. 



San Francisco, California; one specimen. 



6. T. grandicollis, niger, cinereo-pubescens, ore, thoraceque laete 

 rufis, hoc elytris non angustiore transverso, canaliculate, marginato, lateribus 

 valde rotundatis, elytris subtiliter scabris, abdomine obscure testacee. Long '28. 



San Francisco ; one specimen. 



7. T. f i d e 1 i s , niger, subtiliter pubescens, mandibulis, thoraceque rufo- 

 flavis, hoc transverso, marginato, vix canaliculate, lateribus paiilo rotundatis, ad 

 apicem nigro, elytris scabriusculis, abdomine flavo. Long. -33. 



Santa Fe ; Fendler. This species difl^ers from all the preceding species in 

 having the internal claw of the posterior tarsi somewhat dilated at base; it is 

 similar in form to the next species, but the second joint of the antennae is pro- 

 portionally much shorter. 



8. T. c o 1 1 a r i s , niger, tenniter pubescens, ore thoraceque flavis, hoc 

 transverso, minus late marginato lateribus subrotundatis, elytris scabris, anteti- 

 narum basi testacee. Long. -25. 



Missouri Territory and Illinois; the basal joints of the antennae are some- 

 times very dark; the abdomen is entirely black. 



9. T. b i 1 i n e a t u s Lee. Agassiz Lake Superior, 229. Cantharis bill- 

 neatns Say. J. Ac. Nat. Sc. 3, 182. 



Middle States and Lake Supprior. The pestpcctus is nSually fuscous, but a 

 variety from the Southern States has that part as light colored as the abdomen. 



10. T. d i V i s u s , niger, griseo-pubescens, ore thoraceque flavis, hoc quad- 

 rate, lateribus rectis angulis anticis rotundatis posticis rectis, margine anguste 

 reflexo, disco subcanaliculate, maculis duabus magnis fere confluentibus potato, 

 utrinque versus angulos anticos subexcavato, elytris subsf riatim scabris. Long. -S. 



California, San Francisco. 



11. T. impressus, niger, thorace transverse, latins marginato, disco 

 subcanaliculate ante basin late impresso, disco antice profunde transversim 

 impresso, lateribus flavis, elytris valde punctato-scabris. Long. -24. 



