AMERICAN COLEOPTERA. I'AT 



The tribe has affinities in two directions, the first group with the 

 Odacanthini, the second with the Dryptini. Schaum (Ins. Deutschl. i, 

 p. 251), places the. genera of the present tribe in his group Odacanthidfe 

 which inchides also the Odacanthini and Anchonoderini of the present 



essay. 



Tribe XXIX.— Odacanthini. 

 Antennfe slender, free at base, first joint as long as the next two, three basal 

 joints glabrous. Head oval more or less elongate, prolonged behind the eyes and 

 narrowed to a neck, two supra-orbital setse, elypeus moderately prolonged, trun- 

 cate, a setigerous puncture on each side. Eyes large moderately prominent, very 

 narrowly separated from the mouth beneath. Labrum moderately prominent, 

 sexsetose in front. Maxillse slender, ciliate and spinous within, outer lobe biarticu- 

 late with equal joints, palpi slender, the last two joints nearly equal the terminal 

 slightly fusiform, acute at tip. Mentum emarginate and toothed, ligula usually 

 truncate at tip and bisetose, the apex free for a short distance, the paraglossfe small 

 rarely longer than it, the palpi slender the last joint slightly fusiform acute at 

 tip, the penultimate not longer than it and bi- rarely trisetose ir^ front. Thorax 

 narrow, the margin usually feeble or even entirely obliterated, a seta near the 

 middle of the side, a second at the hind angle which is often feeble. Body sub- 

 pedunculate, scutellum not projecting between the elytra. Elytra oblong-oval, 

 base not margined, sides narrowly inflexed, margin entire without internal plica, 

 the apices truncate, sometimes rather obliquely. 'Prosternum not prolonged. 

 Mesosternum oblique the epimera very narrow. Metasternal epimera distinct, 

 posterior coxa; contiguous. Legs slender, the middle and posterior tibia; slightly 

 ciliate externally, the anterior emarginate within, the spurs small. Tarsi usually 

 slender rarely flattened, the fourth joint at most feebly emarginate. Claws simple. 

 The anterior tarsi exhibit no ditierences in the two sexes. 

 In all the genera there will be observed numerous punctures, bearing 

 short erect hairs, situated either in the second stria or the third interval. 

 The tribe as here constituted js the same as in Lacordaire except that 

 Stenochila is excluded and Calophsena added. There is a close rela- 

 tionship between this tribe and the Ctenodaetylini, and they are united 

 by some authors, the only difference of moment being that the elytra are 

 here truncate and there entire. 



With the Lebiini and Dryptini there is also a very close relationship, 

 the characters separating the present tribe from the former are certainly 

 not very well marked if we admit the Lacordairean aggregation. The 

 Lebiini of the present essay is composed of the Lebiides of Lacordaire 

 excluding especially Agra, the Pericalides and Mormolyce. Two of these 

 "•enera have an elono;ated head and thorax and all have truncate elytra. 



I can find no constant character separating the Odacanthini from the 

 Dryptini. excepting in the form of the labial palpi. For this reason 

 I remove Stenochila which' has not only the long joint of the antennae 

 but also the penultimate joint of the labial palpi plurisetose. Calophsena 

 however has the palpi and antennae of the present tribe. 



