74 Journal New York Entomological Society. [Vot. vm. 



>Enigmaticum Matth. 



The body is parallel, moderately convex, the head entirely exposed 

 and but slightly inclined, the eyes moderate in size, convex, with 

 rather coarse convex facets as usual, the antennse inserted at some dis- 

 tance from their antero-internal margin in angulate emarginations of 

 the front. The prothorax is narrowed at base and truncate at base and 

 apex, the apical angles very obtusely rounded, the basal more distinct 

 but obtuse, the elytral suture strongly and widely margined, the line 

 extending along the well-developed and transversely triangular scutel- 

 lum nearly to outer third of each elytron. The anterior coxre are 

 small and distinctly, though not broadly, separated, and the pro- 

 sternum is largely developed in front of them ; the middle coxae are 

 rather narrowly, the posterior very widely, separated, the legs slender, 

 with the tibiae somewhat clavate and the tarsi rather slender, with the 

 basal joints small. The basal segment of the abdomen is about as 

 long as the next three combined. The two species known to me are 

 minutely reticulate and subglabrous, each puncture bearing a very 

 small but distinct cinereous hair ; they may be defined as follows : — 



Prothorax broadly subangulate and widest at the middle, the sides straight or very 

 feebly sinuate thence to the basal angles ; body dark castaneous, finely and 

 sparsely but very distinctly punctate. Length 0.75-0.9 mm.; width 0.42- 

 0.5 mm. California (San Francisco) californicum Csy. 



Prothorax almost evenly rounded at the sides, becoming much more convergent toward 

 apex, the latter scarcely more than half as wide as the base, the disk widest be- 

 hind the middle and narrowed but slightly at base ; punctures sparse and very 

 minute, those of the pronotum more visible and having the form of minute trans- 

 verse arcs, enclosing each a very minute hair ; color dark brown ; size smaller 

 and rather more slender inform than > alifornicum. Length 0.6 mm.; width 

 0.25 mm. Florida elongatum Lee. 



Elongatum was described as an Orthoperus by LeConte, and the type 

 is not before me at present, but a drawing from this type made by me 

 some years ago seems to show that the prothorax differs so greatly in 

 outline from that of californicum as to indicate some divergence of a 

 generic nature. 



In the recent posthumous "Monograph of the Corylophidoa and 

 Sph?eriidre," page 35, Mr. Matthews has fallen into a singular misap- 

 prehension, as my letter to him will undoubtedly show. My language 

 was not by any means intended to imply that his &nigmaticum 

 ptilioides was identical with Orthoperus elongatus, but simply stated my 

 conviction that the elonmtus of LeConte is an /Enigmaticum. There 



