474 Coleopt ecological Notices. 



C. gagates Horn. — Notibius gagat. : Trans. Am. Phil. Soc, XIV, p. 357. — 

 Robust, oblong, convex, strongly alutaceous, smooth, black ; epistoma, legs and 

 antennae, especially toward tip, paler, dark rufous ; vestiture as in seriatus. 

 Head large, transverse, strongly rounded laterally near the eyes, finely, rather 

 sparsely punctate ; epistoma moderately sinuate in the middle ; upper lobe 

 of eyes rather small, broadly oval ; antenna? robust, moderately incrassate, 

 compact, scarcely as long as the pronotum, third joint short not twice as long 

 as wide and much shorter than the next two, tenth nearly twice as wide as 

 long, the eleventh distinctly narrower. Prothora.c less tlian one-half wider 

 than the head and two-fifths wider than long ; apex much wider than the 

 base, truncate, slightly oblique and straight at the sides, the apical angles 

 being distinctly prominent and produced anteriorly, slightly acute and not at 

 all rounded ; base very feebly arcuate throughout, the sinuations rudimentary ; 

 basal angles very obtuse and narrowly rounded ; sides evenly and moderately 

 arcuate throughout ; disk broadly, feebly explanate at the sides, finely, densely 

 punctate, the punctures slightly finer and sparser toward the middle, not in 

 mutual contact laterally. Elytra a little wider than the prothorax and about 

 twice as long ; sides feebly, evenly arcuate ; humeri broadly rounded ; disk 

 rather sparsely and extremely finely punctate, with excessively fine and feebly 

 defined rows of nearly similar punctures, which are generally just perceptibly 

 impressed as seen under certain angles of illumination. Abdomen polished, 

 very finely, sparsely punctate. Epipleurse broad. Hypomera broadly expla- 

 nate. Legs moderate in length, very robust throughout. 



Male. — Anterior tibiae probably not modified. 



Length 5.8 mm. ; width 2.9 mm. 



Arizona. 



This species is quite aberrant, not only in the structure of the 

 prothorax, but in elytra! punctuation ; the latter is, however, only 

 an extreme form of that existing in seriatus. It is not as strongly 

 convex as most of the others. 



C. grail Hiatus Lee— Notibius gran. : Ann. Lye. N. Y. V, p. 145. — Rather 

 slender, parallel, moderately convex, somewhat dull, the elytra more shining, 

 piceous-black, the elytra black ; legs and antennae rufous ; vestiture as in 

 seriatus. Head feebly transverse, very slightly convex, the edges slightly 

 reflexed above the antenna? ; sides very feebly emarginate at the epistomal 

 suture ; epistoma moderately sinuate in the middle ; surface dull, rather 

 finely, very densely punctate, the punctures confused posteriorly, more iso- 

 lated, smaller and granuliform anteriorly ; upper lobe of eyes small, broadly 

 oval ; antennas not very robust, the last three joints abruptly wider, slightly 

 shorter than the head and prothorax, third joint long, fully equal to the next 

 two together. Prothorax about one-third wider than the head and one-third 

 wider than long ; apex very feebly incurvate, the angles distinctly rounded ; 

 base equal to the apex, very broadly, feebly arcuate, the basal angles very 

 acute and prolonged posteriorly much beyond the median portions ; sides 

 rather strongly arcuate anteriorly, straight and convergent thence to the base ; 



