PREDACEOUS GROUND-BEETLES. 
45 
wing-covers, and all the other parts reddish-yellow ; and several similar 
smaller species, which seem to pass insensibly into each other, are often 
found in colonies under stones in dry places. Lebia contains many 
prettily colored species, mostly a quarter of an inch or less in length. 
Lebia grandis, Hentz (Pig. 11), upwards of a third of an inch long, colored 
much like a Brachiuus, is our largest species. This is one of the pre- 
dacious insects which have been seen to devour the larvae of the Colo- 
rado potato-beetle. The species of Lebia are sometimes found on low 
or herbaceous plants, and sometimes running up the trunks of trees in 
search for their minute insect prey. 
The genera Dromius , meaning a runner, and Galleida, meaning beau- 
tiful, have similar habits. Gymindis is found under stones. Casnonia 
Pennsylvania, an elegant little insect, quarter of an inch long, and re- 
markable for its slender spindle-shaped thorax, is usually seen running 
upon the ground. The head and thorax are black, and the elytra red 
with two black bands. It is not a very rare species. 
Leptotrachelus also, as its name implies, has a slender thorax, of about 
the same width throughout. This genus is usually classed in this sub- 
family, or near it, but it is exceptional, in having the elytra entire and 
completely covering the abdomen. 
Helluomorplia, of which we have several species, and the allied genus 
Morio, of which we have but one Southern species, differ from all our 
other Carabideous insects, in having the antennae stout and almost 
head-like, and either enlarged or strongly compressed toward the tip. 
Sub-family CHLdSNIIDES. 
The distinctive character of the Chlaeuiides consists in the structure 
of the anterior tarsi of the males, which have the three first joints 
widened, and furnished beneath with crowded points, or hair like papillae 
[Fig. 12 | 
all of the same length so as to 
resemble a brush. These 
joints are usually more or less 
rounded at the corners, bear- 
ing a fanciful resemblance to 
the patella or knee-pan, which 
suggested to Latreille the 
name Patellimani, by which 
he designated this sub-family; 
muni, meaning hands, a term 
which is sometimesapplied by 
Cm., HMDS i-bnksyi.vamcus, Say n, male beetleV. front ell tOTlH>IogistS to tile fore feet 
taraua ol female ■ d, front tarsus of male, showing the nf tl, „ ,*• 
Widened ami rounded or imtellifovm joints ; r, underside of 01 Ct etlCS, DCCAUse 1 ilCJ UT6 01- 
® am % showing the brush-like surface— after Riley : it, lar- .,,,,1 ,, i -,- 
ta oi ciiLdixius — alter chapuis and caudiize. tt n constiui lt d and used dif- 
ferently from the others. But 
