20 Memoirs on the Coleoptera 



third, the others to the second, stria; lateral foveoles irregularly 

 spaced; legs very moderate in length. Length (cf) 9-5 mm.; 

 width 3.8 mm, Mexico (Guerrero), — Baron. ... *aeneicauda Bates 



I can perceive no very good reason for naming this species 

 CBneicauda, but it seems to be correctly identified. 



Tanystola Mots. 

 Tanystoma Esch. (nom. praeocc.) 

 The species of this genus are only two in number, so far as known, 

 and were described as Anchomenus sulcatus and striatus by Dejean; 

 they were unknown to LeConte when he drew up his synopsis in 

 1854. They are moderate or rather small in size, more or less 

 convex, with oblong-oval hind body and quadrate Calathus-\)k.e 

 prothorax, and are apparently apterous; they are specially dis- 

 tinguished by having the fourth palpal joint a little longer than the 

 third. The mentum tooth is trapezoidal, with narrowly truncate 

 apex, the antennae slender, with the third joint rather distinctly 

 longer than the fourth, the thoracic sides well reflexed, the sides of 

 the elytra rather abruptly reflexed, gradually a little more rounded 

 basally and with long and feeble apical sinus, and the met-episterna 

 are very short, about as long as wide. The legs are moderate but 

 with long and very slender tarsi, the three dilated joints of the 

 anterior in the male evenly convex above; the claws are long and 

 notably slender. The two known species are the following: 



Body oblong, more elongate and less convex than in striata and larger in 

 size, shining, dark piceous-brown in color; head well developed, 

 scarcely longer than wide, the eyes moderate and only feebly convex; 

 surface with a few feeble rugulse laterally, the anterior impressions 

 shallow; antennee fuscous, rather long and slender, the third joint 

 notably longer than the fourth; prothorax quadrate, only a little 

 shorter than wide, widest before the middle but with the subparallel 

 sides only very moderately arcuate throughout and broadly reflexed, 

 the angles obtuse and rounded; base much wider than the rather 

 deeply sinuate apex; transverse impressions both somewhat distinct, 

 the stria between them moderate; foveal region closely and dis^ 

 tinctly punctured, the punctures extending forward in the broad 

 lateral gutters almost to the apex; foveae very shallow and in- 

 definite, limited externally by the more strongly reflexed basal 

 part of the lateral margin; elytra oblong, three-fifths longer than 

 wide, two-fifths wider than the prothorax, the sides parallel, broadly 

 arcuate, not more rapidly so at base; apex rather obtusely rounded, 

 with long and feeble sinus; striae moderate, smooth, impressed, the 



