106 LE CONTE.— LONGICORN COLEOPTERA 



Page 31. 3. Criocephalusobscurus;tlie name must be changed toobsoletus, with synonyms. 



Callidium ohsoletum, Randall, Bost. Journ. 2, 27. 



Callidium rusticuni, Hald. 35. 

 Page 37. Distenia undata, Serv. Enc. Math. 



Stenocorus undatus, Fabr. Syst. EI. 2, 311 ; Oliv. 69, 15. 



ADDENDA. 



1. Eburia stigm a, Dej.Cat. 



Ceramhyx stigma, 01. 67, 23, 180. This species probably does not occur in our territory : the basal maculae 

 are single. 



2. Stenocorus testaceus,01. 69, 2, 20. Probably exclusively African. 



3. Callidium dentipes, 01. 70, 4, 40. Probably tropical. 



4. Callidium bifasciatum, Fabr. Syst. El. 2, 336; 01. 70,4,42. There is a confusion of 

 localities ; Fabr. says it is from South America. 



5. Callidium pulverulentum, 01. 70, 8, 102. Probably Elaphidion. 



PART ir. CONTAINING THE PRIONI. 



The insects of this division are distinguished from all other Longicorns by their 

 margined thorax ; their affinities have already been sufficiently pointed out in the 

 introductory remarks, (Vol. 1, p. 312, et seq.,) and the few genera occurring in the 

 United States cannot serve to illustrate them any farther : I therefore pass at once to 

 the consideration of the genera. 



Those found within our own territory may be arranged as follows : 



a. Mesosternum porrectum in prosterni emarginatione receptum. Sphenostethus. 



h. Mesosternum simplex. 



' 1-spinosus; tibia filiformes; palpi breves. Tragosoma. 



1-vel 3-spinosusj tibias compressae, palpi elongati, antennae imbricatae. Prionus. 



3-spinosus ; tibice compressa3, palpi elongati, antenna baud imbricatae. Derobrachus. 



3-spinosus, tibiae compressae ; palpi mediocres ; antennae intus acute marginatae. Orthosoma. 



multispinosus, antennae filiformes, articulo 3'° longissimo. Trichocnemis 



^ (^serratus, antennae filiformes, articulo 3'° baud longiore. Mallodon. 



SPHENOSTETHUS Hald. 



Mesosternum porrectum, cum prosterno emarginato arete conjunctum. 



Antennae corpore multo breviores filiformes (vix serratje) articulo 3'° paulo longiore. 



Thorax antrorsum angustatus, angulis posticis emarginatis, basi bisinuatus, elytris arete conjunctus. 



Tibiae filiformes, baud compressae. 



The head is very small for this tribe, and the gradual narrowing of the body in 

 front gives this genus somewhat the facies of Desmocerus. 



1 . S. SERRiPENNis. — Nigro-piceus, nitidus, capite punctate, excavato, thorace punctato, densius ad latera, 

 elytris sat dense punctatis, postice subangustatis, apice late rotundatis, serratisque. Long -85 — -96. 



Hald. Pr. A. N. S. 3, 126. 



For a fine pair of this rare insect, found in New Jersey, I am indebted to Mr. Guex. 



s J, 



