PREDAOEOITS GROUND-BEETLES. 
47 
The next two genera resemble still more closely some of the Harpali- 
des, but the structure ot the tore-feet of the males places them in the 
present sub-family. They are easily distinguished, however, from the 
great majority ot the Harpalides, by having the thorax nearly or quite 
as wide at base as the elytra. 
The meaning of the generic name Oochs. is, resembling the letter 0, the 
species being of a regular oval form, and the thorax and elytra being of 
precisely the same width and closely applied to each other. lu this re- 
spect they resemble the genus Amara among the Harpalides. The genus 
hadister , meaning a feist walker , is composed of a small number of pretty 
little glossy reddish beetles, spotted with black, a style of coloration in 
strong contrast with the usually dark colors of the Carabidie. 
iHi 
Sub-family HAKCAI.inKS. 
The Harpalides, as here defined, embrace a very extensive group of 
beetles, not much inferior in numbers to all the other sub-families com- 
f s (Fig ' 13 ] biued; and as they are most- 
>f f\ « - e , ly of black or dark metallic 
colors, and as their size is for 
_ the most part limited in its 
I J . r=^ -rr^rii .rrsm range from a quarter of an 
_ . ^ inch to a little more than half 
Supposed larva of Haiu’alus (in the act. of devouring a 
Curculio larva) : — B, headseen from beneath : j, i, It, marks ail ilicll iu length, aU(l when 
on under side of abdominal segments, becoming fewer to- 
wards the tip-after Walsh. we add to this that their 
most distinctive characters are restricted to the male sex, some idea can 
be formed of the difficulty of classifying them, or of referring any par- 
[Flu. i4.] . tieular species to its proper location. Their 
distinctive character lies in the structure of the 
tarsi of the males, which often have both the 
anterior and middle tarsi dilated, and instead 
of having a uniform brush upon the under side, 
they are furnished with two rows of little 
J_ transverse plates, or scale-like papilhe, and the 
hairs which border the sides of the tarsi are 
usually coarser, or more bristly than they are 
Geer: — The side figure exhibits^ tll6 ChliLlliideS | <iD(l t.ll(3 clllglcS Ot tllO dili-ltcd 
Kimofihoimi'io niir|.a'iu«!'si.mv joints are more prominent. The first section, 
pupiiim! t Nonr°uio "-'mT uf 'tile however, or Anisodactili, have the tarsi brushed 
characteristic of the anterior underneath like the Chheniides, but differ from 
of the°tibi'ai aplnaat ’it^uppe? them in having the middle tarsi as well as the 
angle-after Riley. anterior ones dilated ; and they moreover har- 
monize better with the Harpalides in their general aspect. 
