378 
The Ohio Naturalist. 
[Vol. VIII, No. 8, 
similar bristles on the underside as the middle femora, about one 
third longer than tibiae, these about two and a half times as long 
again as the tarsi; first tarsal joint usually a little longer than 
second. Length, d” 1 2-2, 2 mm., 9 2, 6-2, 9 mm. 
Male: head, pronotum and mesonotum together longer than 
the rest of the body; first antennal joint as long as head, incras- 
sated and compressed and with a submedian spine on the upper 
and under side, the apical part upturned with a tuft of hairs on 
the inner side of the tip, the upper margin of the joint almost 
straight from the base to beyond the middle, the lower margin 
angularly dilated, second joint inserted at right angles to the 
fore side of the apex of the first joint, third joint shorter than first 
wfith the short basal part narrower than the second joint, straight 
and linear, then moderately and suddenly incrassated but not 
dilated and proceeding in a gentle curve to the apex, the curved 
apical part occupying more than two-thirds of the joint and pro¬ 
vided on the posterior side with a very shallowly impressed spongy 
surface with some stiff hairs on the lower margin and a tooth-like 
projection at the base, fourth joint a little longer than third, 
inserted at right angles to the backside of the apex of the third 
joint, unarmed, shortly pilose, rectangularly curved not far 
from the base (fig. 4); fore femora very slightly thickened towards 
the base; middle femora as long as hind femora, slightly curved 
and incrassated towards the base and with a spine on the inner 
side not far from the apex and a very short acute spur on the same 
side immediately before the apex, middle tibiae subsemicircularly 
curved at the base, turning the convexity of the curve outward, 
with a tuft of short hairs on the inner side of the tip of the curve, 
from which point to the apex the tibiae are straight w r ith some 
rather short straight hairs on the outer side of the middle part 
(fig. 5); hind legs straight, simple, three fourths longer than the 
body, the tip of the abdomen slightly passing the base of the hind 
femora when they are stretched straightly backwards. 
Female: head, pronotum and mesonotum together shorter 
than the rest of the body; antennae simple, linear, first joint a 
little shorter than the head, third joint a little longer than first 
with a few rather long and stiff hairs on the inner side near the 
base and apex, fourth joint as long as third; fore femora linear; 
middle legs straight, simple, femora longer than hind femora, 
tibiae a little shorter than femora and longer than tarsi; hind legs 
as long as the body, the tip of the abdomen reaching the apical 
fourth of the hind femora when they are stretched straightly 
backwards. 
Four males, numerous females and some larvae from Puerto 
Barrios. No winged specimens were taken. The genus Rheu- 
matobates was not previously known from Central America. 
