110 GEO. H. HORN, M. D. 



Tribe VI.— Hiletini. 



Antennae moderate in length, inserted under a well marked frontal plate, 

 geniculate, the first joint elongate, received in repose in a depression beneath the 

 eyes. Head oval, stout, with two supra-orbital setae. Eyes small not prominent. 

 Labrum transverse feebly emarginate. Mandibles broad, arcuate externally and 

 curved from above downwards and without seta on the outer side, pluridentate 

 within. Maxillary palpi securiform % or triangular 9- Mentum broad, deeply 

 emarginate with a large quadrifid tooth. Ligula elongate, spatuliform, rounded 

 at tip, the paraglossse shorter, linear and ciliate, terminal joint of the palpus more 

 strongly securiform in the male. Thorax subcordiform. Elytra parallel feebly 

 convex. Presternum prolonged at tip and received in a depression of the meso- 

 sternum, anterior coxal cavities open behind. Metathoracic epimera distinct. 

 Legs moderate. Anterior tibiae entire, the spurs terminal. Tarsi short. Posterior 

 coxae not contiguous. 



The first three joints of the anterior and middle tarsi of the male are feebly 

 dilated and spongy beneath. 



The tribe contains but one genus Hiletun which is unknown to me in na- 

 ture, the above characters have been obtained from the books in great part, 

 to which I have added others kindly observed for me by Mr. H. W. Bates. 

 The relations of the tribe, like many others of the sub-family, are 

 complex, but on the whole it seems better placed near the Pamborini 

 and Carabini than elsewhere. 



Tribe VII.— Elaphrini. 



Antennae moderate in length, rarely longer than head and thorax, three basal 

 joints glabrous, the fourth pubescent at tip or entirely glabrous in Diachila, base 

 free, a slight ridge in Blethisa. Eyes round, usually prominent, moderately distant 

 from the buccal fissure. Front more or less deflexed, with two supra-orbital setae. 

 Labrum moderate, truncate. Mandibles stout, concave extei'nally, with a setiger- 

 ous puncture, arcuate, acute at tip. Maxillae hooked at tip, ciliate or spinulose 

 externally, outer lobe slender biarticulate, palpi moderate in length, terminal 

 joint longer than the preceding. Mentum emarginate with a bifid or emarginate 

 tooth, ligula free at tip, bisetose, acute in Elaphruf!, broad in the other genera, 

 paraglossffi slender longer than the ligula, the palpi moderate, the last two joints 

 equal the penultimate bisetose in front, except in Diachila. Thorax variable in 

 form, the seta in the posterior angle always present, the lateral absent in most 

 Elaphrus. Body not pedunculate, scutellum distinct. Elytra not margined at 

 base except feebly near the humeri in Blethisa, sides narrowly inflexed, margin 

 entire. Prosternum obtuse at tip not prolonged behind the coxae, the coxal cavities 

 closed. Mesosternum not prominent. Metasternal epimera not distinct, the pos- 

 terior coxae contiguous. Legs moderate. Middle and posterior tibiae slightly 

 spinulose externally, the anterior obliquely grooved, the inner spur above the 

 apex. Tarsi slender. 



This tribe contains the three genera quoted above, and I suspect 

 that some if not all of those placed by Chaudoir in his Migadopidae 

 should be added unless the ligular structure is allowed to have weight 

 in their separation. The affinities of the tribe are feeble except in the 

 direction of the Nebriini. 



