138 DESCRIPTIONS OP NEW SPECIES. 



423. H. densus. Piceus subopacus, dense helvo-pubescens, capite 

 thoraceque obscure ferrugineis, dense punctatis,, hoc latitudiue sesqui 

 breviore, a hasi antrorsum augustato, lateribus rotundatis subtiliter 

 marginatis, basi late btsinuata tenuiter marginata, angulis posticis 

 rectis, elytris striis impressis punctis approximatis, interstitiis con- 

 fertim subtiliter punctatis ; pectore rufescente, pedibus testaceis, au- 

 tennis fuscis articulis tribus primis oreque rufo-testaceis ; abdomine 

 nigro nitido parce subtilius punctato. Long. -27. 



Two specimens from Florida, given me by Mr. Hike. Differs 

 from the preceding not only by the color, but by the abdomen 

 being less closely punctured. The antennae are scarcely longer 

 than the head and thorax, and are stouter than usual ; they are 

 moderately serrate in the male, but scarcely so in the female ; the 

 3d joint is slender, and as long as the 4th ; the eyes are alike in 

 both sexes. 



424. H. piuictatissimus. Fuscus subopacus, pube brevi helva 

 sericante dense vestitus, thorace dense subtilius punctato, latitudine 

 sesqui breviore, a basi antrorsum augustato, lateribus rotundatis sub- 

 tiliter marginatis, basi late bisinuata tenuiter marginata, angulis pos- 

 ticis rectis ; elytris striis baud impressis subtiliter punctatis, interstitiis 

 dense punctulatis ; ore antennisque fusco-testaceis, pedibus flavo- 

 testaceis. Long. '24. 



One specimen collected in Arizona by Dr. B. J. D. Irwin, 

 IT. S. A. Differs from the two preceding by the finer puncturing 

 both of the thorax and elytra. The front is nearly smooth, the 

 vertex sparsely punctured, and the occiput densely punctured. 

 The antennae are longer than the head and thorax, rather stout, 

 feebly serrate, with the 3d joint as long as the 4th, but more 

 slender. The body beneath is dark testaceous ; the abdomen 

 finely but not sparsely punctured. 



species) the lateral margin of the prothorax becomes obsolete "towards the 

 apex, and the 3d joint of the antennae is shorter than the 4th ; in the 

 second division ( C. sericea) the side margin extends to the tip of the pro- 

 thorax, and the 3d joint of the antennae is equal to the 4th. 

 The species of Mycetochares form three divisions, as follows : 



1. Anterior coxae separated by the prosternum ; prothorax transverse, 

 nearly as wide as the elytra, (J/. haldemani, fraterna). 



2. Anterior coxae separated by the prosternum ; prothorax narrower than 

 the elytra, (M, bicolor,foveata, tenuis). 



3. Anterior coxae not separated by prosternum, cavities confluent, (J/. 

 binotata). 



