538 OrpeEr—COLEOPTERA. Srection—PENTAMERA. 
Section I. Mentum plate acutely angulated behind. 
Anterior tarsi with last two joints rather suddenly thicker. 
Teeth of anterior tibiz distinct ; hind angles of thorax moderately prominent 1. Planatus, Lee. 
Teeth of anterior tibiz obsolete; hind angles of thorax very feeble .. ae 2. Depressus, Horn. 
Anterior tarsi normal. 
Legs moderate, ambulatorial ; tarsi as long as tibie, and only very feebly compressed. 
Shining species ; apical angle of tibie prolonged. 
Thoracic disc with a deep groove on each side; hind angles spiniform .. 3. Saucius, Lec. 
Thorax not grooved ; angles nodiform —.. A 4. Nitens, Lec. 
Opaque species ; apical angle not longer than upper tooth of mteror files. 
Head and thorax glabrous oe On & aa ee a0 5. Knochit, Lee. 
Head and thorax pilose... 6. Pilosicollis, Horn. 
Legs short, compressed, decidedly feeaniale fe short ae as fone as Ai 
strongly compressed, claws small. 
Hind angles limited within by an impressed line... a ae = 7. Angularis, Lec. 
Hind angles not limited ; legs hairy a ae 0 AG z 8. Schaumii, Lec. 
Section II. Mentum plate subacute behind, and with a slight notch. 
Thorax suddenly constricted at base; hind angles nodiform ce ec 9. Variolosus, Kirby. 
Thorax not suddenly constricted at base ; angles subacute and prominent 10. Squamulosus, Lec. 
Section III. Mentum plate transversely oval, deeply notched behind. 
Surface opaque. 
Anterior angles, with a notch on anterior angles only es a 11. Canaliculatus, Ki. 
Anterior angles limited within and behind by an incisure ; nodiform 12. Castanee, Knoch. 
Surface shining; anterior angles nodiform, without a lateral incisure  .. 13. Harristi, Kirby. 
Group A (=Sect. III. Horn)= Mentum with a deep hind notch. 
Species 1 (87)—CREMASTOCHEILUS CANALICULATUS. 
Niger, vel piceo-niger, vix glaber, subnitidus ; punctato-rugosus ; capite excavato-punctato punctis subeon- 
fluentibus ; menti margine postico profunde emarginato ; antennis articulis intermediis rufescentibus ; prothorace 
subquadrato varioloso, lacunoso, antrorsum angustato postice utrinque profunde impresso ; angulis anticis obtu- 
sioribus, intus fovea adjacente, postice item foveis duabus majusculis, oblongis notatis ; angulis posticis exstan- 
tibus, dentiformibus triangularibus acutis; medio dorsi obsoletius vel latius canaliculato; elytris subrugosis, 
lacunosis, variolosis, striga laterali transversa, alba; abdominis segmento dorsali penultimo utrinque tuberculo 
majori apice spiraculifero. 
Long. corp. lin. 6-63. 
Habitat ; Maryland, Baltimore, Massachusetts, New York. In Mus. Hopeiano Oxoniz, &c. 
Syn.: Cremastocheilus canaliculatus. Kirby, Zool. Journ. iii. p. 151, pl. V, fig. 5, ¢. d. 
Cremastocheilus castamee. Schaum, Germar Zeitschr. iii. p. 255; Burmeister, Handb. iii. p. 681, (nec 
Knoch.) 
Cremastocheilus Hentzii. Harris, Journ. Ac. Phil. vol. v. p. 386. 
This species is larger than the true C. castanee, with a very distinct white spot on each elytra; the head 
and thorax are densely and finely punctured ; the sides of the thorax are attenuated from the middle towards 
the apex. Mr. Kirby’s type specimens are in the Hopeian Collection. 
‘This is the insect which I described as Castanex ; believing that the original specimens of Knoch existing 
in Berlin belonged to this species. I had, however, no opportunity of comparing both together. Burmeister 
has followed me.’ (Schaum in letter of January 9, 1848.) 
