OF THE UNITED STA1 B8. 503 



1. E. lau tus, piceo-castancus, tciinit.T helro-pubescens, capite thoraceque Bat dense pui 

 hoc latitudine non breviore, antrorsum paulo angostato, lateribua late Binnatim rotundatis, nmruli^ 



icis elongatis vaKlc divergentibus, elytria thorace paulo latioribus, Beriatim punctatia, \ 

 suleatis, rugose punctatis, antennis palpia pedibuaque castaneo-rufis. Long. ''■'-. 



One specimen from San Diego, California. The shallow furrows of the elytra are mor< 



obvious behind the middle. 



Cebrio l'tibr. 

 Frons paulo convexa, anticc non marginata: oculi convexi prominuli: lubruui latum, breve, antioe 

 prsecipue late emarginatum, fronte arete connatura: mandibular elongatae fere • lariter ai 



latae, apioe tenues acuta:: palpi maxillarea longiusculi, articulia cylindricis: antennas Bubserratse, II- 

 articulatse, articulo 1'"° non craaaiore, 1' aequali; 2 et 3 conianctis L u ssqualibus; Ll" , ° apico -ul.ito 

 constrictor proaternum breve, sutura lateral] indistincta, poatice longc muoronatnm: coxae anl 

 maiusculse, media; contigurc, posticoe laminis intua subito dilatatia : tibue anticte ad apicem extus paulo 

 products, calcaribua mediocribua: tarsi paulo pubescentc3 longiosculi, articulo 1 ito, - I 



Bubsqualibus, 5 tt longiore, unguiculis integris: abdomen articulo •">"' truncato, 6 i 



This genua is distinguished from the next by the anterior tibia being less compressed 

 ami not emarginate externally; the terminal spurs of all the tibia? arc moderate, while in 

 Scaptolenus, they arc very long; the scutcllum is obtuse and nol elongate. The Bp i i( - 

 resemble each other very closely, and are only to be recognised ly the organic differ- 

 ences pointed out below: they arc castancous above, and testaceous yellow below, with 

 the prosternum dusky, and the antennae ferruginous. Latreille has separated C. bicolor 

 as a distinct genus Selenodon, but such an arrangement i- not tenable. 



A. Palpi articulo >i/timi> maxillarium breviore. 



1. C. b i c ol o r, i . helvo-pubescens, minus nitidus, labro late emarginato, thor 

 bus parallelia anticc rotundatis, (maris confertim, feminse parciua puncl 



gentibus, elytria striatic, intcrstitiis punctatia, aubtus : , antennis ferrugini L 



(fern. 



Fal r. 8; t. El. _'. II; Beam , Ins. | -'■ 



v Latreille, Lnn. Ent. Soc. France, ser. 1, 8, 168. 



Southern and Western States, not rare. The female is apterous, and larger and stouter 

 in its form; the antenna? are onlj as long as the head and mandibles, while in the male 

 they reach beyond the base of the thorax; thej are serrate in both Bexes, with the last 

 joint acuminate: the only specimen of the female that I have Bet n, was tak< n in \l tb una 

 by Mr. If nt/. and given me bj Prof. Hald< man. In both Bexes the apical portion of the 

 mandibles is slender: in the female the tarsi are shorter than m the male, and the ante- 

 rior tibia' are more compressed. 



As this seem- to be the most abundant Bpecies, it i- probably the original Cebrio bi- 

 color. 



2. C. b i m p 1 e x, picec-castaneus, helro-pubeso 

 angustato, lateribua fere rectia (maris confertim fere c tnflui i 



gentibua, elytris nitidis profundi'! 

 gineia. Long. •"-. 

 VOL. X. — SI 



