474 AMERICAN PACHYBRACHYS (cOLEOPTERA) 



stria slightly impressed and more regular, as usual. Shield not noticeable; mar- 

 ginal interspace wide and with a few punctures, especially near the base. 



Pygidiuvi and body beneath entireh' black. Legs sometimes entirely black, 

 front thighs often with a whitish spot in front, hind thighs sometimes with 

 white base and tip, middle thighs more rarely so. 



Length 3 to 3.7 mm. ; width 1.7 to 2.2 mm. 



Distribution. — Florida: Enterprise, April and May (many collections); 

 Haulover, March and Tampa, April (Hubbard & Schwarz); Melbourne, March 

 (Liebeck Coll.); Key West and Green Cove Spring (Leng Coll.); Estero, May 

 6 to 12 (Van Duzee — Wickham Coll.); Jacksonville; Bellaire. District of 

 Columbia: Washington (Linell — Xat. Mus. Coll.). 



Bowditch describes under the name discoideus a unique female 

 from "P. Orange," Florida, from the Snow Collection, in which 

 the type remains. I am unable to discover in the description any 

 good reason for separating this from limhatus Newm. to which its 

 author declares it is allied, but without giving any distinctive 

 characters; and inasmuch as Newman's name is preoccupied, 

 discoideus becomes the name of the species. 



155. Pachybrachys marginatus Bowditch 



Black, front sometimes with two or three small reddish spots; prothorax and 

 elytra with a wide red border which may be partially interrupted at the elytral 

 convexity, and in one male is completely so. The surface lustre though aluta- 

 ceous is — at least in some examples — less dull and opaque than in cruentus, 

 the eyes a trifle more distant (though this also is not constant), the prothorax 

 with evident smooth median line, the legs uniformly black throughout, form, 

 size and sculpture otherwise almost j^recisely as in cruentus. 



Distribution. — Arizona: Prescott (Bowditch Coll.), type; \Mlliams May 29 

 to 31 (Barber & Schwarz); Ariz. (Am. Ent. Soc. Coll.). 



The following variety looks quite different from the typical 

 form and might easily be taken for a distinct species. 

 Var. sanguineus new variety 



Upper surface entirely dull red except for three small basal spots on the 

 prothorax, the scutellum and sutural bead of the elytra, black; otherwise as in 

 the typical form. In one example there are two vague sutural dusky clouds 

 on the elytra. 



Distribution. — Arizona: Chiricahua Mountains, June 4 to 6 (V. L. Clemence), 

 type female, same locahty, June 2 (Hubbard & Schwarz); Santa Rita Moun- 

 tains, May (Hubbard & Schwarz); Williams, June 16 (H. A. Wenzel): "Ari." 

 (Am. Ent. Soc. Coll.), (Liebeck Coll.). 



In both forms of this species the elytral punctuation — espe- 

 cially in the female — seems a bit finer than in cruentus, with the 

 punctures slightly elongate. All specimens show the impunctate 

 median line on the prothorax, while in no example of cruentus 

 before me is it at all distinct, though LeConte mentions such a 



