> UK UNITED STATES. 



a careful examination of the foreign species, some of which bi em bj description to indi- 

 cate a relation towards Cychrus. Ferte* has separated under the name Isotnrsus c< nam 

 species in which the anterior tarsi of the males are not dilated, but without indicating anj 

 other characters by which they can he distinguished. The form of the head, hereto! 

 considered sufficient to separate Panago i from the other sections of •• Patellimanes," has 

 ceased to be diagnostic by the discovery of Eugnathus, below describi 



The detail of the following characters, common to our two genera, may aid future in- 

 vestigation in endeavouring to fix the characters of the group. 



The third joint of the antcnnie is not glabrous, though a Intl.- smoother than the fourth. 

 The mentum is smaller than usual, narrowed in front, and less deeply emarginate, with a 

 tooth in the middle of the emargination ; the ligula is corneous, apparently truncate, with- 

 out distinct paraglossia; the palpi arc long and more or less dilated according I 

 the thorax is constricted at hasc, and the abdomen almost pedunculated: the posterior ap- 

 pendage of the parapleural is very indistinct, the anterior tibiae are emarginate as usual, 

 scarcely thickened at the extremity: the dilatation of the anterior tarsi of the male i- con- 

 fined to the first two joints, which arc spongy beneath. The body above ami beneath is 

 strongly pilose and punctured; the stria' of the elytra are normal in position, hut the 

 51 ties of ocellate punctures near the 8th stria is not visible. Our genera are as follows: — 

 Caput postice constrictum, mandibular breves acutcc - P is L itr. 



Caput postice non constrictum, mandibulae crasstc dilatatrc Eugnathus /. . 



Of Panagreus we have two species; P. cr uci g er us Say, and P. fa s c ial 

 Trans. Am. Phil. Sue. 2, G9. 



EUQNATHl B I. . 



Caput obtusum, postice non constrictum; mandibulae crassae, dilatatte, Bupra concavse api l< 



obtusrc; labrum parvum, inter mandibular supra situm, ti im, antice rotundatum ; palpi 1 



usculi, articulo ultimo ovali truncato; thorax postice sensim vald.- an 

 domen pedunculatum, a tborace rei 



The other characters as inPanagseus; the male is unknown, the only-; f the 



genus i P distinctus Hald. (Stansbury's I' ped. '■'•' \) for the typieal specimen of 



which I am indebted to my friend S. S. Haldeman. It was found mar Sta. I 

 Mexico, and may be thus defined: — 



E. distinctus, rubens, flavo-pilosus, capite, 

 postice valde angustato, lateribua valde rotundatis, elytria d 

 macula transversa nigra utrinque ad medium ornatifl, aj.ice Bumm 

 his articulo l n '° rufo. I 



. . Lachnop) 



On account of the acuminate palpi, these little insects have usuall) I" i ited with 



Bembidium, and in describing the genus Ega, Laporte, with hi tomed quit I 



• Only two genera, Lachnophonu and I 



one o 

 Thi 



The anlen . iles are not dil b 



VOL. \. — 65 



