222 MEMOIRS ON THE COLEOPTERA 



Anterior and middle tarsi (cf ) not known, the types being female, but the 

 general habitus indicates this as the proper place in the series; 

 body slender, much depressed, the prothorax as in Agonoderus, the 

 head smaller, the antennae very long and slender; hind tarsi very 

 slendei and filiform but shorter than in Stenolophus. Rocky 

 Mountain region Agonoleptus 



19 Hind tarsi short but filiform; body very small in size, the scutellar 

 stria very short to obsolete. Atlantic regions Tachistodes 



Hind tarsi more or less stout basally, gradually tapering thence to the 

 tip as in Geopinns and Anadaptus; body not so small, still more 

 convex than in Stenolophus. Nearctic regions Agonoderus 



Remarks on the exotic genera introduced above may be made as 

 follows : 



DICHEIROTRICHUS Duval. This is one of the most remarkably 

 isolated, yet synthetic genera of the entire subfamily and consists 

 of five or six species, confined to the European faunal regions. 

 It is somewhat intermediary between the divisions of the subfamily 

 based upon the structure of the labial palpi, and the male tarsal 

 soles are clothed in a peculiar manner, not exactly as in Aniso- 

 dactylini and widely different from the form developed in Tricho- 

 cellus and Stenolophus. In general appearance the genus undoubt- 

 edly harmonizes better with Trichocellus, and hence with the other 

 Acupalpids, than it does with any of the Anisodactylini. On ac- 

 count of the possession, in common .with Diachromus and TricJio- 

 celhis, of a long erect seta at the hind angles of the prothorax, a 

 character unknown elsewhere in the subfamily, it might perhaps 

 be more logical to assign these three genera to a special tribe. 



BRADYCIDUS n. gen. This genus is rather closely allied to 

 Bradycellus, but differs in many features structural as well as 

 habital; the body is more oblong and less ventricose, the emargi- 

 nation of the mentum deeper and the tooth small and broadly 

 rounded, this being a modification in the direction of Stenolophus, 

 and the anterior and middle tarsi of the male are almost exactly 

 as in that genus and Episcopellus, both being moderately dilated 

 and with two series of elongate scale-like plates beneath. The 

 palpi are slender, the third joint of the labial very gradually and 

 gently narrowed from near the base to the apex, narrowly truncate, 

 the fourth joint of the maxillary not quite twice as long as the 

 third. The frontal foveae are minute, punctiform and not at all 

 obliquely prolonged, this formation being an exception in the 



