BRENTIIiDAE. 499 



first sub-family in our fauna bj tlic nicntuni, which iu the 

 % is transverse and concave, iu the J narrow and convex. 

 Mandibles in 1 curved, flattened, jjointed, more or less 

 toothed on the inner edge: in the 9 stout, small, pincer- 

 sliaped, toothed on the apical edge. Maxillae exposed in 

 Cyladinoe in both sexes, mentum oblong, and supported on 

 a short gular peduncle, which is wanting in true Brenthina^; 

 mandibles short, pincer-shaped. 



Antennae inserted in lateral foveae at a greater or less 

 distance in front of the eyes, accoi-ding to genus and sex ; 

 not geniculate, 11-jointed in true Brenthiua3, 10-jointed in 

 Cyladinai; outer joints finely pubescent and sensitive; basal 

 joint stouter and a little longer than the second. 



Head elongated, constricted behind, except in Cylas; eyes 

 rounded, small, not granulated; labrum wanting. 



Prothorax very elongate, truncate before and behind, 

 without trace of postocular lobes; turned into a peduncle 

 behind, with a broad basal bead ; prosternum very long in 

 front of the coxse; prosternal sutures entirely obliterated; 

 coxie separate in Brenthinte, conical, prominent, and con- 

 tiguous in Cylas; in both the median suture behind the 

 coxse is very evident. 



Mesosternum moderately long, side pieces diagonally di- 

 vided, epimera pointed in front, not attaining the base of the 

 prothorax; coxse. rounded, separate (Brenthinse), nearly con- 

 tiguous (Cylas). 



Metasternum very long, episterna narrow; hind cox;e 

 transverse oval, separated. 



Elytra elongate, covering entirely the pygidium, with a 

 fold on the inner surface close to the margin, which com- 

 mences near the base, diverges obliquely near tlie tip, and 

 extends to the sutural edge in Brenthinse, and nearly there 

 in Cylas. Wings well develojied. 



Abdomen with five ventral segments, of wliich the first 

 and second are very long, and united by an indistinct suture; 

 third and fourth short, fifth a little longer, flat, rounded 

 behind; sutures straight. Dorsal segments membranous, 

 except the last, wliich is corneous; anaL segment of % rather 

 large, rounded. The acute edge of the ventral segments 

 and of the metathorax is prominent, and fits, as usual, into 

 the elytral groove. 



Legs not slender, moderate in length; thighs clavate, 

 front tibiae sinuate, and oblicjuely grooved on the inner side 

 in Brenthinte; armed witli a hook on the outer tip, and a 

 spine on the inner; middle and hind tibiie truncate at tip, 



