Mr. Westwood on the Genus Ctenostoma. 53 
Arr. XIII. Observations upon the Genus of Coleopterous 
Insects, Ctenostoma of Klug, and its Species. By J. O. 
Westwoop, Bsq., I’. L.S., §¢. 
Order. COLEOPTERA. 
Fam. CIcINDELIDZ. 
Genus. Ctenostoma. Klug, Latr., Dej. 
Caris. Fischer. Collyris, p. Fabr. 
Tue principal generic characters of this group have been detailed by 
Dejean, in his Species General, &c., Vol. I. p. 152, and by Klug in the 
Berlin Transactions. The following observations principally suggested by 
the possession of the sexes of one of the species may however be added. 
The upper lip (labrum) of the female is more advanced in front than 
that of the male, and is furnished with a small tooth at each side, and 
three in front, the centre one of which is almost obliterated in the 
male. ‘he figure of the upper lip of Ct. trinotatum, given by Fischer 
in his Genera, Tab,1, f. 8, is very incorrect. 
Fischer and Latreille describe these insects as apterous, and Klug as 
being furnished with moderate sized wings. Dejean (haying only a sin- 
gle specimen of each of the three species) states his unwillingness to 
sacrifice them to verify the fact. Without, however, injuring my speci- 
mens, I have discovered that the the males are furnished with wings, 
about two-thirds of the size of the elytra, unfolded, and with two diagonal 
nerves, and that the wings of the female are not above half the size of 
those of the male, 
The legs of the male are rather longer and larger than those of the 
female, In both sexes the four posterior femora and tibie are com- 
pressed (especially the hinder pair), so that when seen sideways they 
appear much stronger and thicker than when seen from above. The 
anterior tarsi of the male have the first three joints dilated and thickly 
clothed beneath with short hairs; the third joint being produced obliquely 
and flatly on the inside. The tarsi of the female are quite simple. 
Jn the Iconographie des Coléoptéres d’ Europe, t. I. f. 2, the penultimate 
joint of the four posterior tarsi of Ct, trinotatum 2 is represented bilobed. 
Klug’s figure of Ct, rugosum (which is drawn from a female) represents 
