168 EMIL BRENDEL, M. D. 



dorsal base two minute triangular elevations ending in a more elevated point 

 (carina), which all the Trimium possess, in some covered by the elytra. The last 

 anteunal joint bluntly ovate, resembling those in T. impunctatum. Legs not in- 

 flated, probably a 9 • Palpus securiform, much like parvulum, though smaller. 



Cedar Rapids, la. This may be only a variety of T. parvulum, 

 but its size, head, the h)nger elytral impressions and the punctuation 

 near the sutural lines are unlike. 



For comparison I will give here a short description of 



T. pai'Viiliiin Lee. — Length 0.9 mm. — Frontal margin slightly arcuate, the 

 sulcus more hyperbolic than parabolic, occiput much impressed and sulcate to 

 the middle of the vertex, the pronotal sulcus deep, angulate in the middle, 

 where the angle reaches half way to the base. Elytra widest near and behind 

 the middle. Abdominal base narrower than the width of the elytra and as wide 

 as the tip of the same, the basal segment wider at the tip; all the segments 

 equal in length, except the second ventral longer. 



Pennsylvania, Illinois, Iowa. 



The only unrecognizable species for me is T. discolor, which seems 

 to be figuring in different collections by any sort of form, and to be 

 differing from T. parvulum only by the convex occiput. 



The form of the ]ialpus is, in dubiwn, like that in lati.colle, but 

 smooth ; in thoi'acicum is third joint smaller than the club of the 

 second, the last as in parvulum, but much longer; in convexulum the 

 third and the club of the second rather small, the fourth as long as 

 the last anteunal joint, slender, conical, widest in the basal fourth. 



REVISION OF THE SPEt'lES OF A\TIIRAX FKOiV 

 A.YIERIC.4 XORTH OF MEXITO. 



BY D. \V. CHXJUILLETT. 



In the Transactions of the American Entomological Society, 

 volume xiv, pages 159 to 182 (published in October, 1887), I gave 

 a monograpli of the species belonging to the genus Anthrax from 

 America North of Mexico, characterizing thirty-five of the species 

 as new. In December, 1886, and January, 1887, the Baron Osten 

 Sacken published descriptions of several new species of Anthrax from 

 this region in " Biologia Centrali-Americana," Part Diptera, — a paper 

 that I had not seen at the time of writing up the monograph above 

 I'eferred to. It thus happens that three of the species which I char- 

 acterized as new had been previously described by Osten Sacken ; 

 these are : Keenii Coq. = Stomjx clella O. S. ; plagosa Coq. = rex 



