AMERICAN COLEOPTERA. • 153 



The many peculiar characters which Ega possesses seem to me sufficient 

 to place it as a distinct tribe. In the present series the pedunculate 

 body is known to me as occurring only in the Anthiini and it is here too 

 that we have the posterior coxae separated and the eyes oval in the axis 

 of the head. It is by no means easy to determine the true thoracic 

 setigerous punctures as there are many short erect hairs, the true tactile 

 setas will be found remaining when the others are lost. The obliteration 

 of the side margin of the thorax is nearly as complete as in Apotnmus 

 while the absence of the lateral margin of the elytra is an important 

 character which appears to have been lost sight of. 



The separation of the posterior coxas seems to me evidence of a 

 degraded or undeveloped type. 



The relationship of the present tribe is undoubtedly with certain 

 members of the Anchonoderini while the relationship with the Anthiini 

 indicated above may be merely the possession of several characters in 

 common ; there may, however, be genera unknown to me wliich show 

 a true affinity between the two tribes. 



Ega is represented in our fauna by two species, Sallei from the Gulf 

 States, Isetula from California. In the first the elytral grooves or striae 

 do not extend behind the middle and the three dorsal punctures are 

 faintly indicated ; in the second the striae extend at least two-thirds of 

 the elytra and I have been unable to detect any dorsal punctures. 



Tribe XXXIV.-Lebiini. 

 Antennse slender, rarelj' slightly thickened, arising under a slight frontal ridge, 

 the condyle usually exjiosed, the three basal joints generally glabrous, sometimes 

 however, but two or four. Head oval, constricted to a neck or not, with two 

 supra-orbital setse, front either parallel or with convergent sides, clypeus with a 

 setigerous puncture each side. Eyes round or oval, moderately prominent very 

 narrowly separated from the mouth beneath. Labrum usually broader than long, 

 sometimes prolonged covering the mandibles, either truncate or emarginate and 

 sexsetose in front. Maxillfe slender hooked at tip, rather obtusely in Teiragono- 

 derus, ciliate or spinulose within rarely toothed behind the tip {Euccerus and 

 Teiragonoderus) the apex ciliate in many genera, outer lobe biarticulate but other- 

 wise variable, the palpi variable in form from slender to securiform. Mentum 

 more or less deeply emarginate, the epilobes always distinct, the bottom of the 

 emargination either without tooth or with a tooth of variable form ; ligula and 

 paraglossse very variable, the palpi also variable the terminal joint equal to the 

 preceding or longer, the latter bisetose in front (except in some Cymindis). Thorax 

 variable in form, sides distinctly margined and with a seta at the side and at the 

 basal angle. Elytra truncate at tip in a variable manner, the margin acute, entire 

 and narrowly inflexed, without internal plica, the base margined. Prosternum 

 usually obtuse at tip, rarely acute or prolonged {CydosomuH). Mesosternal epi- 

 mera narrow, sometimes almost entirely concealed by the episterna. Metasternal 

 epimera distinct, the posterior coxse contiguous. Legs usually slender, not very 



IliAXS. AM. KNT. SOC. IX. (34) OCTOBER, 1881. 



