185:2.] 93 



is strongly margined both on the sides and apex. The elytra are strongly but 

 not densely punctured ; the inner of the two spots is near the scutellum, the outer 

 one behind the humerus. The posterior band is oblique and sinuous. 



3. N. cavicornis, minus elongatus, fusco testaceus, thorace rotiindato, 

 transverso, cornu elongate, apice concavo, crista subito valde elevata, elytris 

 punctatis, macula scutellari, lineolis anticis, fasciaque postica nigro-fuscis. 

 Long. "ll. 



J^ec. An. Lye. 5, 152. 



San Francisco, California : male with the apex of the elytra acute, obliquely 

 truncatp on the outer side. The thorax is one-half wider than long, the horn 

 broad not serrate, stronsly excavated at tip, crest broad, high, margined on the 

 sides and apex, which is rounded. Elytra distinctly, not densely punctured. 



4. N. serratus, elongaf us, testaceus, thorace globoso, corna antice con- 

 cavo, serrato, crista subito valde elevata. elytris subtilius punctatis, macula scu- 

 tellari, lineolis anticis, fasciaque lata )X)stica infuscatis. Long. -17. 



Mouocrns .serrat/ff Lee. Journ. Ac. Xat. Sc. New Ser. 1, 90. 



Near the Rocky Mountains. One male specimen has the elytra immaculate, 

 with the apex slightly truncate. The horn is broader than usual, strongly serrate, 

 concave at the apex; the crest is high and rises very suddenly, is strongly mar- 

 gined, but scarcely rounded at the apex. The elytra are more finely punctured 

 than in the preceding species. 



5. N. monodon, elongatus, testaceus, thorace globoso, subtransverso, 

 cornu antice concavo, serrato, crista sensim modice elevata, elytris minus subti- 

 iiter punctatis, macula scutellari fasciaque postica nigris. Long. 12. 



Ferte Anthic. 37. 



AnthicHs monodon Fabr. Syst. El. 1, 2S9 : Say, Am. Ent. 1, pi. 10. 



Mouocerus monodon var. a. Lee. Journ. Ac Nat. Sc. New Ser. 1, 90. 



Massachusetts, Pennsylvania, Georgia, Missouri Territory and California. The 

 horn is serrate, broad and concave at the apex; the crest is moderately broad, 

 rises gradually and is margined on the sides and tip, which is somewhat acute. 

 The elytra are strongly punctured, though less so than in N. anchora ; the scu- 

 tellar spot is sometimes wanting. 



6. N. api calls, elongatus, testaceus, thorace globoso, cornu antice con- 

 cavo, lateribus serrato, crista subito valde elevata, elytris densius punctatis, 

 macula scutellari, fascia postica, apiceque nigris. Long. -15. 



Monocerus monodon Lee. Journ. Ac. New Ser. i. 90. 



Detroit, 3Iichigan. Easily distinguished from the preceding by the form of 

 the horn. Tte thorax is not at all transverse ; the horn is broad, concave at the 

 apex, serrate on the sides ; the crest rises very suddenly, and is margined at the 

 sides and apex, which is rounded. The elytra are tolerably densely punctured. 



7. N. m ar ginat u s, valde elongatus, testaceus, thorace subgloboso, cornu 

 vix serrato, crista subito valde elevato, elytris suhtiliter punctulatis, gutta sub- 

 scutellari, linea submarginali, fascia tenui postica, apiceque nigris. Long. -16. 



Detroit. Easily distinguished by its much narrower form. The thorax is 

 less narrowed behind than usual, and not at all transverse ; the horn is margined 

 and scarcely serrate ; the crest rises suddenly and is margined at the sides and 

 apex, which is rounded. The black marks of the elytra are very narrow; the 

 fascia is angulated at the suture, and does not reach the margin ; the submar- 

 ginal line extends from below the humerus to the apex. 



8. N. sub til is, valde elongatus, fusco-testaceus, thorace globoso, subtrans- 

 verso, cornu serrato, crista subito valde elevata, elytris subtilissime punctulatis, 

 macula scutellari, fascia ad medium apiceque nigris, margine infuscato. 

 Long. '13. 



Missouri Territory, one specimen. Differs from all the preceding species by 

 the fascia being at the middle of the elytra. The thorax is slightly transverse ; 

 the horn is concave at the apex, subserrale ; the crest rises abruptly and is 

 strongly margined and somewhat rounded at the apex. 



