[ November 1882 SYNOPTIC TABLES OF COLEOPTERA. 47 
POCONUS, ». 
Dr. Horn classifies them Trans. Am. Ent. Soc, V, 249. as follows: 
Mentum tooth deeply notched; ligula with a single bristle at tip. 
'Epilobes of mentum acutely toothed; elytra with distinct basal marginal line, scutel- 
__ lar stria and three punctures on the outer side of the third interval. tezanils, 
Epilobes of mentum obtuse, Thorax cordate, form elongate, parallel. Elytra with 
feeble basal marginal line and scutellar stria and dorsal punctures as in dexanzs 
planatus. 
Mentum tooth shorter and broader, feebly emarginate, ligula bisetose at tip. 
Epilobes of mentum obtuse. Form of f/anatus, thorax not narrowed at base; pros- 
ternum broadly sulcate; scutellar stria absent; basal marginal line obliterated at 
middle, forming at the humeri a moderately elevated recurved carina; stria ob 
literated at base. Two dorsal punctures only, one median on the outer side, the 
other one-fourth from the apex on the inner side of the third interval. Lecontei. 
P. texanus, Chaud, Revue. Mag. Zool. 1868, p. 64, Tex.—7-8 mm. 
P. planatus, Horn,=depressus, || Lec. Trans. Am. Ent. Soc. 1874, p. 44, Cal. 5.5— 7m, 
P. Leconte’, Horn,=parallelus || Lec. loc. cit. Tex.—5.5mm. 
PATROBUS, /z. 
(From Trans. Am. Ent. Soc. 1875, p. 730 see also |. c. p. 248.) 
Dr. Horn tabulates the species as follows: 
Disc of thorax convex, hind angles with a rather deep fossa; head behind the eyes con- 
stricted. a 
Last two joints of maxillary palpi equal. .................... longicornis, Say. 
Washiwo jomts unequally terminal longer... . eee. ses oe septentrionis, Dej. 
Disc of thorax flat, subquadrate, hind angles depressed without fossa; head not or very 
feebly constricted behind the eyes; terminal jomts of maxillary palpi equal. 
Hind trochanter -J' one-third the length of the femora and not differing from 
(DEE iE Hoe O) arin cee oeinen cra eee So bis’ Claes Lee rugicollis, Rand. 
Hind trochanter J nearly half the length of the femora and acute at tip, that of 
OR MOUND epee eee eta. >, £2) SER ree nA eer secerTos aterrimus, Esch. 
Hind trochanter <j’ nearly as long as the femora, at tip slender and very acute, 
that of the Q scarcely differing from the 9 © of the two proceeding. 
californicus, Motsch. 
P. longicornis, Say. Trans. Am. Philos. Soc. Il, 40;=americanus. De}. Spec. III, 34. 
N.Y., Can. to Texas.—12-15 mm. 
P. septentrionis, Dej. Spec. Ill, 29; Jc. 2, t. 106, f, 2.—Schaum. Nat. Ins. 1, 377.— 
Schoenh. Dej. Cat. 3ed. p. 32.=yperborcous De}. Spec. 3, 30;==fossifrons, Esch. 
Mem. Mosc. 1823 VI, 104;=/fovetcollis, Esch. Mem. Mosc, 6, 105 ;=/ongiveniris, 
Mann. Bull. Mose.’53, 011 145;—/enzis, Lec. Ag. Lake Sup.1850, p 207;=rz/ipes, 
Lec. New species. I, 1863, p. 18. America and Europe.—10 mm. 
£. rugicollis, Rand. Bost..Jonrnal, II, 1. N.Y., Pa., Mass. and northward.—11I-12mm 
P. aterrimus, Dej. Spec. III, 32; Esch. Dej. Cat. 3ed. 32;=/wdlcratus, Lec. Ann. and 
Mag. Nat. Hist. 1869. Ser. 4. Vol, IV, 374. Col. and N.W. to Alaska. 
P. californicus. Motch. Bull. Mosc. 1859 II, 123. trochantericus Lec, Ann. and Mag. 
Nat. Hist. Ser. 4. vol. IV, 375. Cal.—11-15 mm. 
P, fuluus, Mann. Bull. Mosc. 1853, III, p. 145, from Kadjak and P. angusticollisy 
