BRUCHUS. 455 
Horn’s B. limbatus, and supposed to have been examined by Horn, does not agree with 
the description, and is probably uncharacterized, though it may prove to be an 
extremely large variety of B. ruficoxis. 
32. Bruchus placidus. 
Bruchus placidus, Horn, Trans. Am. Ent. Soc. iv. (1878), p. 341°. 
Hab. Norva America, Arizona 1, Texas }.—Mexico, Northern Sonora (Morrison). 
33. Bruchus serenus. 
Rufus, ochraceo-vestitus, haud maculatus ; antennis haud elongatis, extrorsum fuscescentibus ; femoribus poste- 
rioribus dente gracili denticulisque duobus instructis. 
Long. 23 millim. 
Hab. Guatemaa, San Joaquin in Vera Paz (Champion). 
Another species represented by a single example, very similar to B. placidus, but with 
a rather long apical spur to the hind tibia, this latter only very slightly curvate at the 
base, and the femora not so dilated; the antenne, too, are longer ; the under surface is 
entirely red, the breast not being black in the middle, as it isin B. placidus. The 
head, like the rest of the surface, is red, rather longer in front than it is in the 
allied species; the antenne are stout, a little serrate internally, with the penultimate 
joints strongly transverse, the terminal joint rather paler than those preceding it. The 
upper surface has no appearance of maculation either of the ground-colour or 
pubescence. 
34. Bruchus submuticus. 
Parvus, rufus, ochraceo-vestitus, vix submaculatus ; sutura angustissime nigra, pectore medio nigricante ; antennis 
brevibus, testaceis ; femoribus posterioribus dente minuto denticulisque tribus minutissimis armatis. 
Long. 27 millim. 
‘Hab. Mexico, Northern Sonora (Morrison). 
This insect is very similar to B. placidus, and, like it, has the surface of a nearly uni- 
form dilute red colour. 3B. submuticus is, however, smaller, and is entirely distinct by 
the extreme minuteness of the armature of the hind femora, in which respect it rather 
resembles B. ruficovis. The upper surface of the head is black; the third joint of the 
antennz only slightly longer than the second, the penultimate joints strongly transverse. 
The thorax is transversely conical ; the spur of the hind tibia slender and moderately 
long, rather longer and more slender than that of B. placidus. In the male the last — 
ventral ring is deeply emarginate in the middle, in the female only very slightly. 
The series of twelve examples we have received exhibit very little variation, except 
that the pubescence in very fresh examples is white, especially beneath, and the faint 
maculation of the elytra is in these examples more distinct. 
