128 MODERN SYSTEM. 
or nearly quadrate, generally longer than broad : legs, the first and 
second pair longest: the second rather longest; the third and 1'ourti 
pair of legs much less, sometimes one being largest, sometimes t e 
other. 
The mandibles of the animals composing this genus are either per- 
pendicular or somewhat indexed; in many conical with many short 
claws. 
* Thorax convex, cordiform; the. skies, especially behind, abruptly 
sloping, anteriorly broadly truncate; the largest legs not double the 
length of the body; the first and second /mir much thicker than the 
others, sometimes one sometimes the other being longest. I he first joint 
of the tarsi, with several moveable little spines, in a single or in a double 
series; the claws of the tarsi naked. Lip somewhat oval, the apex 
truncate or obtuse. Apex of the maxilla wedge-shaped. 
Sp. 1. Tho. citreus. Thorax at the insertion of the eyes transversely 
elevated; the sides anteriorly produced and prominent: eyes equal : 
abdomen roundish, trigonal, broader behind, with a red line on each 
side: body yellowish citron-coloured. 
Inhabits Europe, living in ilowers. It is very common in Britain. The 
male is rare, smaller than the female; of a brown colour banded 
with yellowish green. 
*'* Thorax convex, cordiform; the sides, especially behind, abruptly 
sloping, the anterior part broadly truncated; the larger legs not twice 
the length if the. body, all of nearly unequal degree of thickness; the 
hinder four not much shorter; the anterior with four tittle spines: the 
claws of all the tarsi scarcely visible. Lips somewhat oval: the apex 
truncate or obtuse. Maxilla at their points wedge-shaped. 
Sp. 2. Tho. lynceus. Lateral eyes largest, placed on an eminence, the 
tubercles of the hinder ones thickest: body pale yellowish-grey, 
variegated with punctures and spots of a blackish colour : abdomen 
very large, of a triangular-oval form, broader behind. 
Inhabits France and Scotland. Latreille considers it to be much allied 
to Thcmisus onustus of Walckcn’aer. 
*** Thorax depressed, somewhat oval, very obtuse before; the large 
legs not twice the length of the body; all the legs of' equal thickness : 
the tarsi hairy beneath, the first joint with, a few little spines: the apex 
with two brushes under the claws : abdomen oblong: the maxilla beyon 
the insertion of the palpi, nearly of equal breadth, distinctly and abruptly 
truncated: lip somewhat quadrate: hinder eyes distant. 
Sp. 3. Tho. oblongus. Pale-yellowish, with white hairs above: abdo- 
men somewhat cylindrical, with obscure longitudinal lines. 
Inhabits France, Denmark, and England, on plants. 
