TENEBRIONID.E 209 



at the basal angles, which are very acute, everted and obliquely 

 prominent; surface transversely tumid behind the middle, thence 

 gradually sloping and nearly flat, with two feeble impressions at 

 each side, to the apex, rapidly and convexly sloping basally, the 

 punctures relatively rather coarse, deep and moderately close; sides 

 thin, not much more coarsely punctate and rugose; elytra barely 

 one-half longer than wide, four-fifths wider than the prothorax, 

 evenly oval, widest at the middle, the sides evenly arcuate to the 

 obtuse but only slightly blunt humeri, not very rapidly rounding, 

 behind, the apical lobe large, obtuse and but feebly differentiated; 

 surface of each nearly flat but sloping upward to the suture from the 

 moderately thick margins, almost vertically declivous behind, 

 smooth, alutaceous, each with two fine vestigial costules, the granules 

 laterally very distinct; abdomen unusually finely and sparsely, 

 subasperately punctulate, very finely punctate apically; tarsi very 

 slender. Length (9) 13.7 mm.; width 7.0 mm. California (Colo- 

 rado River, San Diego Co.), Fuchs unica n. sp. 



The apical lobe referred to is the apex of the elytra as seen from a 

 viewpoint vertically above, and results from the overhanging of 

 the bulging posterior flanks; this apical lobe sometimes becomes 

 very conspicuous and is occasionally very nearly obsolete as in 

 some examples of adumbrata; it is not of very much importance 

 taxonomically. Obsoleta is represented in my collection by a 

 rather homogeneous series of twenty-two specimens, and I fail to 

 note any one that might be considered a bond with either expansa, 

 brevipes or longula. 



Group II Type muricatula Lee. 



The species of this group are almost as numerous as those of the 

 obsoleta group; they are much smaller and especially more slender 

 and parallel in form, and present an equally difficult and uncertain 

 taxonomic problem. The prothorax is seldom much narrower than 

 the elytra, the latter smooth, though as in the preceding group, 

 sparsely granulose, the granules however being larger, each bearing 

 a longer or shorter erect seta, the length of which is to some extent 

 proportional to the size of the granule, the latter differing in size 

 among themselves more evidently than in group I. The sexes do 

 not differ very much, the male being somewhat smaller and more 

 abbreviated as a rule than the female; but the maxillary palpi are 

 notably small and feeble in both sexes. I would propose the fol- 

 lowing seven species and two subspecies: 

 T. L. Casey, Mem. Col. Ill, March, 1912. 



