MONOTOMID.E 95 



Europs unicolor n. sp. Male parallel, moderately slender, somewhat 

 shining and depressed, pale ochreo-testaceous throughout in color, the 

 upper surface with distinct reticulation throughout; head not quite as 

 wide as the prothorax, somewhat wider than long, evenly and moderately 

 convex, the punctures rather strong, oval,umbilicate and widely separated; 

 eyes large, between two and three times as long as the short rectangular 

 tempora behind them; antennae but little longer than the head, the third 

 joint obconical, less than twice as long as wide, the ninth large and fully 

 as wide as the tenth; prothorax somewhat elongate, parallel, slightly 

 widest at about apical third, the sides feebly arcuate and obsoletely 

 serrulate, some serrules near the rounded basal angles more distinct; 

 apical angles obtuse; surface even, the punctures numerous, rather small, 

 umbilicate, the hairs subdecumbent and not conspicuous, a median line 

 impunctate; scutellum rather large, longer than wide, obtusely constricted 

 basally, obliquely pointed apically; elytra fully three-fourths longer than 

 wide and a fourth or fifth wider than the prothorax, broadly truncate 

 at tip, the parallel sides very feebly arcuate; striae fine and with fine and 

 well separated punctures, bearing rather coarse short subdecumbent 

 setse, stouter than those of the prothorax, the alternate intervals also with 

 a few remote punctures; pygidium large, transversely convex, almost as 

 long as wide, strongly and evenly, not very coarsely or closely punctate, 

 the punctures of the additional segment numer6us but smaller; abdomen 

 moderately punctured, the basal segment without post-coxal modification 

 of any kind, as long as the next three, the fifth as long as the first and 

 having a large, elongate-oval median impression, extending throughout 

 the length; all the tarsi have a brush of hairs beneath. Length (c? 1 ) 2.8 

 mm.; width 0.78 mm. Texas. 



The antennae in this genus betray a distinct transition toward 

 the purely 3-jointed club of Glischrochilus (Ips] and Pityophagus, 

 which are closely related to Rhizopliagiis; the ninth joint forms a 

 part of the club and is in no wise a segment of the funicle, as it 

 should be regarded in all other genera of Monotomidse. This, and 

 a community of tarsal structure, lead me to believe that it would 

 be a partial solution of some of the taxonomic difficulties in this 

 part of the Coleoptera, to organize a family which might comprise 

 the three genera mentioned, the present Monotomidas, Tisiphone 

 (Smicrips) and probably a few others. Hypocoprus seems best 

 placed in the Cucujidae. The tarsi of Rhizophagus have the small 

 joint at the base of the long last joint well developed and free, but 

 otherwise they are almost exactly as in Monotoma and there are 

 but two other points of divergence in the structure of the body, the 

 feeble depression at each side of the buccal opening, which partially 

 receives the antenna in my own opinion of very trivial importance, 

 owing to the feebly developed stage of this structure and the 



