114 GEO. H. HORN, M. D. 



their antennae backward over the body in a more or less curved position 

 when in repose, in Notiophiius the antennae are bent down under the 

 head and encircle the margin of the eye. 



The affinities of this tribe are more marked in the direction of the 

 Elaphrini than elsewhere, and it may be e.specially observed that all 

 those characters which separate Opisthius from the other genera are 

 found in ElapJirus, the ligula and paraglossse of these two genera are 

 also similar. 



Baron Chaudoir (Bull. Mosc. 1861, i, pp. 492 and 502), separates the 

 above genera making N'otiophilus a separate tribe and placing the others 

 as a sub-tribe of Carabini. If it be considered advisable to divide 

 the above tribe, Opisthius and Notiophilus are equally worthy of repre- 

 senting distinct tribes. The union of the tribe with Carabini seems 

 to me unnatural from the appearance of the genera as well as from 

 their characters. 



Tribe X.— Migadopini. 



Autennse slender, arising under a slight frontal ridge, four basal joints glabrous. 

 Eyes round, not prominent, moderately distant from the mouth beneath. Head 

 short, broadly oval, clypeus distinct and with a setigerous puncture each side 

 distant from the margin, one supra-orbital seta. Labrum short, truncate, quadri- 

 setose in front and ciliate at the sides. Mandibles acute at tip, feebly arcuate, 

 without setigerous puncture externally. MaxilL-e arcuate at tip, spinulose within, 

 outer lobe biarticulate, palpi stout, the terminal joint somewhat oval, obtuse at tip. 

 Mentum short and broad, emarginate, with a broad emarginate tooth nearly as 

 long as the lateral lobes, ligula oval, bisetose at tip, the paraglossaj moderately 

 broad and adherent in their entire length, palpi moderate, terminal slightly longer 

 and truncate at tip, the penultimate bisetose in front. Thorax broad, hind angles 

 distinct, no lateral setae. Elytra slightly margined at base, sides narrowly inflexed, 

 margin continuous. Prosternum acute at tip and prolonged, concave beneath and 

 covering the middle of the mesosternum, anterior coxa? closed behind. Middle 

 coxse moderately separated, the mesosternal epimera very indistinctly separated 

 from the episterna but attaining the coxal cavity. Metasternal epimera indistinct, 

 posterior coxae contiguous. Legs moderate. Anterior tibiae obliquely grooved 

 within at tip, outer edge slightly spinulose, the inner spur above the apex. 

 Middle and posterior tibiae spinulose externally, the spurs moderate in length. 

 Tarsi moderate in length, the first joint not longer than the second. 



In the specimen before me of Migadops (Brachycselus) virescens 

 the anterior and middle tarsi of the male have four joints dilated and 

 papillose beneath. 



Through the great kindness of my friend jMr. H. W. Bates, I have 

 been enabled to examine the specimen above indicated. I regret that 

 I have been compelled to define the tribe in a somewhat incomplete 

 manner but there will be no difficulty in assigning a place here to those 

 genera whose affinities indicate it. 



