172 MEMOIRS ON THE COLEOPTERA 



widely diverging; body large, broad and subglabrous, sombre in 



coloration. Atlantic and Gulf regions Spongopus 



Paraglossae with the slender apices not widely diverging; body small in 

 size, densely punctate above and beneath, pale, with large obscure 

 elytral macula, nearly as in Gynandromorphus; hind angles of the 

 prothorax sharply right, with an erect seta as in Dicheirotrichus and 

 Trichocelliis, the second labio-palpal joint long and with very 

 numerous bristling setae as in typical Anisodactylus. Palsearctic 

 regions *Diachromus 



The genus Dicheirotrichus, which was placed in this tribe by 

 Duval, is a singularly annectant form. The tarsal pads of the 

 male are loose and rather confused, but the general facies of the 

 body is somewhat as in the Acupalpid genus Trichocellus . The 

 second joint of the labial palpi has three long setae. I have placed 

 it among the Acupalpids rather than here. The European genera 

 introduced for comparative purposes in the above table are all so 

 well known that it seems unnecessary to dwell more upon them, 

 further than to say that Hexatriclms Tsch., seems to be valid as a 

 genus rather than as a subgenus of Anisodactylus, which is its 

 present position in the recently published catalogue of Heyden ; 

 Reitter and Weise. 



Triplectrus Lee. 

 Gynandrotarsus Laf. 



This genus has been united with Anisodactylus in modern works, 

 but there are some peculiarities which seem to show that it can be 

 regarded as a genus with a good deal of propriety. Its species can 

 always be recognized at once by the strongly trifid anterior tibial 

 spur, which is always a non-sexual feature, but aside from this there 

 is a modification of the anterior female tarsi occurring here and 

 nowhere else in the tribe not developed in all the species it is 

 true, but clearly defined in several, such as harpaloides, opaculus 

 and texanus; this is the lateral dilatation of the basal joint, a very 

 significant character, recalling a nearly similar modification in 

 Stenomorphus and Gynandropus. Intervals 3-5-7 of the elytra 

 have in all the species a few serial punctures along the median line 

 of the interstice at apex, exactly as in Glanodes, and especially in 

 Piosoma alternata; this is another puzzling parallelism and a char- 

 acter which is not observable in Anisodactylus. The basal joint 

 of the hind tarsi is very long, often scarcely shorter than the next 



