572 Goleopterological Notices, VII. 



I can scarcel}'^ imagine, however, that Dr. Brendel could have made 

 three such radical mistakes in his description of impunctatum y. 

 and therefoi'e leave the matter for further development. 



Trimioplectus Bndl. — The body in this genus, as represented 

 by T. obsoletus, the type and only known species, is convex and 

 formed nearly as in Melba, the mesoparapleurse and metasternal 

 fovea as in Dalmosella, the flanks of the elytra wholl,y without 

 trace of post-humeral foA^ea, but witli a fine line parallel to the 

 side margin in apical half. The biarcuate pronotal sulcus is almost 

 exactly as in the European Trimium, being at a greater distance 

 from the base than in the related American genera owing to the 

 greater elongation of the prothorax, and ending near the lateral 

 edges in slight, nude, punctiform dilatations. The head is smaller 

 than the prothorax, wider than long, with large well developed 

 eyes and short terapora, and with two small, nude, widelj'^ sepa- 

 rated and wholly isolated foveae at some distance behind the mid- 

 dle, the frontal margin rather wide and separated from the vertex 

 by a feeble transverse sulcus, which is feebly and posteriorly ar- 

 cuate and disconnected in every way from the fovese ; the palpi are 

 normally trimiiform. The antennse are much longer than in any 

 of the allies of Trimium or Actium, and the joints are less trans- 

 verse and more loosely connected, the tenth joint of the male 

 about ^ wider than long, the eleventh but little longer than the 

 preceding three combined. The long bristling setae of the under 

 surface do not seem to terminate in knob-like enlargements, but 

 to have their extremities asperate for a short distance. The discal 

 impression of the elytra extends broadly impressed and substri- 

 iform to or beyond the middle. The abdomen is formed in quite 

 a different manner from that characterizing the allies of Melba 

 and Trimium, the segments decreasing in width from the apex of 

 the first ; the first dorsal is notably longer than the second, with 

 a feeble transverse impression at base extending through nearly 

 •^ the discal width and limited by abrupt but scarcely cariniform 

 lateral extremities, the formation nearly as in Trimium. The sec- 

 ond ventral in the male is nearly as long as the next four combined 

 along the middle, but much shorter at the sides, the seventh in the 

 form of a transverse semicircular pygidium, and the third has a 

 small pubescent tubercle at the apex and lateral fourth or fifth. 



The genus is remarkably isolated among the American forms^ 



