211 



[October 



sex of ciniiamomea^ obioiiga,- and dubin the hind thighs each end in two 

 teeth, one on eacli side of the point of attachment of the tibiae ; the 

 intermediate tibiae of tlie male c'uinamoniea are distinctly curved, while 

 those of liinicollis are widened at the apex ; and the hinder tibiae are 

 curved in ciniiaiuoniea, oblonga, dnbia, ovahs, bruunea, ptuictulata, and 

 calcavata. In t'ne females of all the species the tibiae are straight and 

 the femora never toothed- as is also the case in the male of a single 

 species, parvitla. In the genus Doiiacia the hind femora of the male 

 are often furnished with two large triangular teeth, while those of the 

 female have tw^o slightly smaller (crassipes, bidensj or one large and 

 one very indistinct tooth (deiitata, sparganii) ; some males have only 

 a single large tooth while the female has either none or one very 

 slightly developed (lemncs, sagittarirf, nigra, ajffinis J ; while D. 

 crassipes, bideiis, and dentata also have the hinder tibiae of the male 

 with a number of fine rounded teeth on the inner side. The following 

 (among other) species have the hind femora toothed in the male : 

 Colenis dentipes (with two teeth, one blunt and one sharp), Cyrtusa 

 minuta, Agavicophagus cephalotes, Hydnobius punctatissimus (both strongly 

 hooked), H . piinctatus (tooth spiniform), H. stvigosiis (tooth broad and 

 triangular), Choleva angiistata and C. sturmii, Agathidinm nigvipenne, A. 

 atrum, A. seminuliim, Liodes orbicularis, all the species of Colon except 

 C. latum, and Epurcea decemguttata (which also has the hinder tibiae 

 excised at the apex). The males of some species have the hinder 

 thighs much thickened ; such as : Steiius Juno (which also has the 

 hinder tibiae widened and curved), Megarthrus denticollis in which also 

 the intermediate tibiae are curved, Telmatophihis caricis, Rhyncliites 

 betulos, Necrodes littoralis (in which the thickening is sometimes 

 enormous and which also has the hinder tibiae curved), Osphya 

 bipunctaia, Oneomera femovata (in which the hinder tibiae are strongly 

 bent) and, most remarkable example of all, CEdemera nobilis, in which 

 the hind thighs project from the sides like huge knobs. In the males 

 of the British species of Clytus the hinder thighs are much elongated, 

 and the same sex of Callidiiim aim has the hind thighs greatly curved. 

 The males of several species have the posterior tibiae curved ; 

 instances being Silpha quadripunctata, Cryptophagus populi, Phratora 

 viilgatissima, Thyamis Itirida and nastiirtii, and Strangalia armata, in 

 which species the curved portion is finely crenulate, with a tooth at 

 each end. A tooth is present on the posterior tibiae of the male 

 Stenus ater ; and the male Malthinus fasciatus has a tubercle behind the 

 middle of the same limb. The males of Hydroina gracilis in addition 

 to having all the femora thickened have the hinder tibiae ciliated on 

 the inner side, while the same sex of H. pygmcea has the posterior 

 tibiae thickened from the middle to the base. Megarthrus depresses 

 and sinuatocollis have the hinder tibiae thickened in the male, while 



