AMERICAN COLEOPTERA. 167 



or slightly emarginate, allows the genital armature to become more 

 plainly visible and we thus count more segments. Galerita and any 

 of the larger Dryptini will illustrate the above ideas. 



The species of Brachynua are found under logs and stones usually 

 in damp situations and often in colonies. Those in our fauna have the 

 head, thorax and legs yellowish, the elytra blue. They have not yet 

 been separated in any satisfactory manner. 



Tribe XLI. — Apotomini. 

 Antennse slender arising under a slight frontal ridge, two basal joints glabrous', 

 third very little longer than the fourth. Head broader behind the eyes, front 

 with one supra-orbital seta, elypeus moderately prolonged. Labruni short, trun- 

 cate. Eyes oval, not prominent, narrowly separated from the mouth beneath. 

 Mandibles arcuate, acute at tip and with a .setigerous puncture extei'nally. Maxillte 

 hooked at tip, ciliate within, the outer lobe rather slender, biarticulate, the palpi 

 very long and slender, the joints hairy, the last shorter than the preceding and 

 pubescent. Mentum broad, feebly emarginate without tooth, ligula moderately 

 prominent, rounded at tip and with four long setse, the paraglossse adherent, 

 a little longer than the ligula and obtuse at tip, the palpi slender, second joint 

 plurisetose in front, last joint a little shorter, slender, acute at tip and hairy. 

 Thorax globular, truncate in front, tubularly prolonged at base, sides not margined, 

 sutures entirely obliterated, sides with but one setigerous puncture at middle, 

 none at hind angle. Body subpedunculate, scutellum very small. Elytra oblong, 

 sides narrowly inflexed, obliquely sinuate near the tip which is somewhat pro- 

 longed, no internal plica and no marginal ocellate punctures and no dorsal punc- 

 tures. Presternum not prolonged at tip. Mesosternum nearly vertical in front, 

 the eoxse rather widely separated, the epimera narrow and indistinct. Metasternal 

 epimera distinct. Posterior coxae rather widely separated, the first ventral segment 

 distinctly visible between them. Femora stout, especially the anterior. Tibise not 

 ciliate or spinulose, the anterior deeply emarginate within, the inner spur superior, 

 middle and posterior tibiae obliquely grooved a)id emarginate at the outer apical 

 angle. Tarsi slender in both sexes, claws simple. 



This ti-ibe contains only Apotomus which occurs in Europe, East 

 Indies and Australia. It has been placed near Bemhidhtm and Scarites 

 by Latreille. Dejean removed it to the Ditomides in which position 

 Lacordaire leaves it. Duval (Genera i. p. 43), recognizing its want of 

 affinity with these, forms of it a distinct tribe which he places between 

 the Clivinites and Ditomites, a line of affinities which seems as unnatural 

 as any that could have been chosen. It seems to me better placed near 

 the Broscini as one of the most sharply defined tribes of the sub-family. 



Tribe XLIL— Broscini. 



Anteuufe moderate in length with a variable number (three to five) of basal 

 joints glabrous. Head not constricted but usually gradually broader behind the 

 eyes, front not sulcate, one supra-orbital setigerous puncture and often with a post- 

 orbital cicatrix. Eyes oval, distant beneath from the mouth. Clypeus moderately 

 prolonged with lateral setse. Labrum moderately prominent, slightly emarginate. 



