284 SUPPLEMENT. 
This is the species alluded to under C. hastatus (anted, p.78) as “C. limbatus, Lec.,” 
in error. 
The discrimination of species of this section is a matter of great difficulty and doubt. 
This species and C. hastatus have the disc of the thorax opaque; in C. hastatus the 
yellow margin of the thorax is wider, and the scutellar patch is almost always united, 
generally broadly, with the apical black. The Sonora specimens, which are typical, 
are small, with the abdomen nearly quite yellow; those from Chihuahua are larger, 
with each segment black with yellow margins, but they are variable. If, however, 
C. hastatus cannot stand, I think that the whole series (including C. pennsylvanicus, 
De Geer) will have to be merged into one species. 
PODABRUS (to precede the genus Discodon, p. 78). 
Podabrus, Fischer, Westwood, Introd. to Mod. Class. Ins., Gen. Synops. p. 27; Leconte, Proc. 
Acad. Phil. v. p. 83483 ; Lacord. Gen. Col. iv. p. 8352; Leconte & Horn. Class. Col. N. A. p. 210. 
Although Podabrus is widely dispersed in the Nearctic region, we have not had 
before to record its occurrence in Central America; and there is no doubt the genus 
only just passes the northern border of our country. From the cooler parts of the North- 
American continent some forty species have been described; and it is probable that 
those of the Old World will not be less numerous when the Asiatic species are as well 
known. 
1. Podabrus mexicanus. 
Niger, parum nitidus, nigro-fuscus; ore, epistomate prothoraceque rufo-testaceis, hoc disco late nigro-fusco 
vittato; antennis, palpis et labro fuscis; abdominis margine obscure pallido. Long. 14 millim. 
Hab. Mexico, Pinos Altos in Chihuahua (Buchan-Hepburn). 
Head subrugulose towards the base, pitchy black behind the eyes; front, including 
the antenniferous tubercles, testaceous red. Antenne and palpi entirely fuscous black ; 
the latter have the inner sides of their basal joints pale; extreme edge of the clypeus 
and tips of the mandibles blackish. The gular part of the head is yellow, but the 
sides of the neck beneath are fuscous. Thorax quadrate, slightly transverse; front and 
base truncate, the latter emarginate; sides nearly straight; disc with an obsolete 
impressed line. Scutellum dull fuscous. Elytra fuscous or leaden black, very finely 
coriaceous. 
Underside of the body and legs fuscous black; only the extreme tips of the coxe are 
pitchy. The lateral margins of the abdomen are pale but pubescent, and not clear or 
distinctly yellow. 
Only two specimens have come under my notice. Their larger size will separate 
them from most of the species described by Leconte from the United States. They 
