RUTELIN^: 53 



distinct; scutellum sparsely punctate, not sulcate; elytra a fourth 

 longer than wide and fully two-thirds wider than the prothorax, 

 feebly cuneiform, with arcuate sides, the edge only slightly thickened 

 basally, the hurneri widely exposed, tumid and shining; costae sub- 

 even throughout, barely as wide as the deep sulci, the sculpture of the 

 latter feeble and confused; pygidium feebly, circularly tumid at 

 apex, moderately convex, with short sparse stiff hairs, the transverse 

 sculpture rather fine and shallow, somewhat close, conspicuously 

 interlacing; tooth of the anterior tibiae small and obtuse; hind tibiae 

 barely longer than the femora. Length (9) 11.5 mm.; width 5.8 



mm. Southern Arizona pimalis Csy. 



A Nearly similar in habitus and coloration but not so stout and with 

 relatively larger prothorax; head nearly similar but with the 

 antennal club smaller, distinctly shorter than the preceding five 

 joints; ligula deeply concave longitudinally, the bottom of the 

 concavity more or less acute; prothorax nearly similar but with 

 the sides more evenly arcuate, becoming gradually more con- 

 verging before the middle; scutellum narrower, more elongate; 

 elytra nearly similar in general character but relatively longer and 

 narrower, not one-half wider than the prothorax, the sulcus front 

 the humeral callus to the apex the eighth from the suture- 

 largely and irregularly interrupted by transverse rugae in the type; 

 pygidium gradually more obtusely tumid apically and with the 

 transverse interlacing sculpture much coarser, closer and deeper, 

 the short erect hairs more numerous; tibiae nearly similar; met- 

 episterna not paler but bright metallic green. One example has 

 the pronotum wholly pale, with bright testaceo-aureous lustre. 

 Length (9) 11.2-11.5 rnm.; width 5.2-5.6 mm. Southern 



Arizona. Four examples prolixella n. subsp. 



Form much narrower and relatively more evenly oval, shining, pale 

 testaceous throughout, the head and pronotum with feeble greenish 

 or violaceous surface lustre, the hind femora opalescent; head slightly 

 more than half as wide as the prothorax, very densely and strongly 

 punctato-rugulose, more discretely punctate basally; clypeus twice 

 as wide as long, with more broadly rounded angles; antennal club 

 barely shorter than the five preceding joints; prothorax differing 

 distinctly in outline, fully a fifth wider than long, the sides sub- 

 parallel and very evenly, strongly arcuate throughout, gradually a 

 little more converging apically, the apical angles prominent and 

 very acute, the basal rounded; median lobe of the base relatively 

 much wider than in the two preceding; surface sparsely punctate, 

 more coarsely but shallowly laterally, the median sulcus shallow, 

 extending from near the apex to a little behind the middle; oblique 

 lateral fossae less deep than in any of the preceding, the sublateral 

 pit isolated; scutellum rather wider than long, sharply cordiform, 

 finely, sparsely punctate and not sulcate; elytra about a fourth 

 longer than wide, almost parallel, the sides feebly arcuate and but 

 slightly converging, more abruptly and broadly obtuse at the bi- 

 lobate apex than usual, the lateral edge thickened basally, two-fifths 

 wider than the prothorax, the ridges even throughout, rather nar- 



