1 84 MEMOIRS ON THE COLEOPTERA 



that it cannot be in any way closely related to embaphionides ; a 

 corresponding difference in the form of the elytral setae in generically 

 related species has, however, been previously noted under Heter- 

 asida. The absence of actual specimens of either of these two very 

 interesting species, renders it impossible for me to give any structural 

 generic characters relating to the mouth-parts, antennae or tarsi. 



Litasida n. gen. 



The single type of this genus greatly resembles polita of the next, 

 in being deep black, oblong-oval, smooth, and evenly convex and 

 the mentum is similarly notably small, obtrapezoidal, separated 

 from the narrowly rounded, moderately prominent sides of the 

 buccal opening by wide vacant intervals, the gular pedestal high, 

 rather narrow and sinuate and the ligula large tumid and non- 

 retractile. But, as an exception to all other types in this part of 

 the series, the trochantin is obsolete, the sterna separated merely 

 by a cleft, and the elytra are but narrowly inflexed beneath as in 

 Microschatia. The eyes and antennae are nearly as in the following 

 genus, but the latter are distinguished from anything else in the 

 tribe by a sexual modification of the sixth joint in the male, where 

 this joint is distinctly though not greatly wider than either of those 

 adjoining it; the apical part is gradually enlarged through joints 

 eight to ten. The labrum is but slightly transverse, with a small 

 deep apical sinus between two unusually prominent and narrowly 

 rounded lobes. The legs are rather short and moderately slender, 

 except the tarsi which are unusually long, the intermediate in the 

 male somewhat longer than the tibiae and the posterior four-fifths 

 as long; the tibiae as well as the under surface of the tarsi have 

 sparse and short pale spinuliform inclined hairs; the claws are 

 rather long, feebly arcuate and distinctly compressed. The type 

 of this rather isolated genus is the following: 



Body oblong-oval, evenly and moderately convex, glabrous, deep black 

 throughout and somewhat opaque; head feebly impressed trans- 

 versely, opaque, minutely, indistinctly punctulate, the epistoma more 

 shining and with distinct but sparse punctures; antennae rather stout, 

 black, extending (cf ) almost to the thoracic base; prothorax three- 

 fifths wider than long, scarcely narrower than the elytra, much nar- 

 rowed anteriorly from the middle, the apex scarcely two-thirds as 

 wide as the base, deeply sinuate, the angles blunt; base transverse, 

 posteriorly oblique at each side, the angles right, formed entirely 



