128 - Trans. Acad. Sci. of St. Louis. 
with the medial joints less than twice as long as wide; lustre 
DOUGHOG. 6. sc cic cccc coccee tanbincevcede ese besd vou tene mane saeaueesecl? 
12— Form stouter; head well developed, fully as wide as long, the sides 
parallel and straight, the angles broadly rounded; eyes well developed, 
at less than twice their own length from the base, the punctures coarse, 
moderately sparse, wanting at the middle of the vertex; prothorax 
distinctly elongate, just visibly wider than the head, the sides par- 
allel, nearly straight, the basal angles broadly rounded, the punctures 
only moderately coarse but less sparse than usual; elytra longer than 
wide, parallel, a fifth wider and barely a fourth longer than the pro- 
thorax, the punctures fine, arranged in rather regular and feebly 
impressed series almost throughout; abdomen distinctly narrower than 
the elytra, minutely, not very closely punctulate and somewhat shining. 
Male unknown; female with the sixth ventral conical, convex, rather 
narrowly but obtusely rounded at tip. Length 6.8 mm.; width 1.18 
mm, California (Yuma) ......cccesececcccceccce cess MMronitens 0. sp. 
Form somewhat more slender and elongate; head very nearly as long as 
wide, coarsely and sparsely punctate, the sides behind the eyes nearly 
straight and just visibly converging to the broadly rounded basal 
angles; eyes at one-half ‘more than their own length from the base; 
antennae rather thick, not quite as long as the head and prothorax, 
the latter distinctly elongate, very slightly wider than the head, the 
sides subparallel and nearly straight, broadly rounding toward base, 
the punctures rather coarse, sparse, narrowly aggregated along the 
median smooth area; elytra unusually elongate, parallel, fully a fourth 
longer than wide, about a fourth or fifth wider and a third longer than 
the prothorax, the punctures rather small but distinct, arranged in 
regular and broadly impressed series nearly throughout; abdomen 
obviously narrower than the elytra, minutely and rather sparsely 
punctulate and shining, black above, the under surface feebly rufescent 
throughout. Male unknown; female with the sixth ventral rather 
broadly rounded at tip. Length 7.0 mm.; width 1.05 mm. Texas 
(Galveston). oecin.ceicecdne.sseesce avec ssien sicess CMIVORCORICA D. BD. 
The representatives of more distinct structural types, among 
the species above described, are californica, which stands 
alone, polita and floridae, which form an isolated group, and 
longiuscula and all the other species, which form a natural 
ageregate, although, as may be inferred, there are marked 
differences in coloration. The sexual characters of fallaciosa 
are remarkably different from those of any other species, the 
contrast between the very narrow deep ogival notch of the 
sixth ventral in that species, and the large, broadly rounded 
emargination of the same segment characterizing soror, for 
example, being very remarkable. It is probable that the 
Lathrobium seriatum, of LeConte, previously referred to, 
