RUTELIN^; 49 



sulcipennis Burm., as its type, for, as organized at present, it has a 

 number of discrepant elements, one of which is here removed under 

 the name Strigodermella. One of the chief peculiarities of the 

 genus, in the assumed typical form, is the closely and very regularly 

 sulcate elytral sculpture. The mes-epimera arise in rather tumid 

 outline before the elytral humeri and the mesosternum is tuberculi- 

 form between the coxae. In the male the larger anterior claw is 

 almost exactly as in Lamoana, described above, the very short 

 appendage of its upper surface scarcely diverging and so thin as to 

 be almost bristle-like; in the female the same claw is longer, more 

 slender, parallel, feebly arcuate and very moderately and almost 

 symmetrically cleft at tip. The female is generally very much 

 more abundant than the male. The species in my collection may 

 be arranged as follows, the characters in every instance being 

 drawn from the female, except in the case of viridicollis Schf., 

 where the only specimen is a male; they are all of the sulcipennis 

 and arboricola types, having the elytra evenly and closely sulcate 

 throughout the width, and are numerous in Mexico, but were all 

 included under the name sulcipennis by Mr. Bates: 



Lateral oblique impressions of the pronotum very deep and fossulate; 

 pygidium with sculpture of subrectilinear transverse interlacing 

 lines, generally deep and conspicuous. Southern Arizona to Central 

 America 2 



Lateral impressions feebler to almost completely obsolete; pygidium 

 with feebler and more superficial sculpture, consisting of transversely 

 wavy anastomosing lines; basal bead of the pronotum fine but 

 always entire. Nearctic regions 8 



2 Head finely and sparsely punctate basally. Body elongate-sub- 

 rhombiform, polished and intense black throughout, without trace 

 of metallic lustre at any part; head three-fifths as wide as the pro- 

 thorax, strongly but not coarsely or very densely, irregularly punc- 

 tate, sparsely and finely so behind the line of the eyes, which are not 

 at all prominent and with unusually large and high anterior canthus; 

 clypeus twice as wide as long, almost parallel, rectilinearly truncate 

 and with very moderately rounded angles, the surface broadly 

 indefinitely impressed peripherally, the edges only very slightly 

 reflexed; antennal club rather longer than the preceding five joints; 

 prothorax very nearly as long as wide, the feebly converging and 

 nearly straight sides slightly subprominent before the middle, the 

 acute apical angles much advanced; basal bead strong but widely 

 and completely interrupted medially; surface smooth, minutely, 

 sparsely punctate laterad, the oblique lateral fossae large and deep, 

 the intermediate rounded and external, the space between the two 

 T. L. Casey, Mem. Col. VI, Oct. 1915. 



