176 
CHRYSOMELIDjE. 
Subfamily III. CRYPTOCEPHALINiE. 
Of cylindrical compact shape. Head perpendicular, flat; eyes 
kidney-shaped, distant or sometimes touching above ; antennae 
filiform, in some genera short and with dilated terminal joints. 
Thorax transverse, subcylindrieal, sides and anterior portion 
strongly deflexed. Scutellum generally triangular, sometimes 
elongate, lanceolate, in one genus ( Dioryctus ) not visible from 
above. Elytra not wider than base of thorax, more or less strongly 
lobed at sides, not covering pygidium, surface punctate-striate. 
Legs moderately elongate ; tarsi more or less triangular, first joint 
sometimes longer than second, claws appendiculate or simple. 
Prosternum of variable shape, more frequently subquadrate, its 
anterior edge more or less strongly produced and hollowed for the 
reception of the parts of the mouth, the posterior margin generally 
concave with the angles produced and pointed. 
Within our limits this is one of the most numerously repre- 
sented subfamilies of the whole of the Chrysomelid®. It comprises 
an enormous number of species of neat and cylindrical shape and 
greatly varied colour and pattern. The species of this subfamily 
can as a rule be separated from the Clytrince , which they somewhat 
resemble, by the deeply emarginate eyes and filiform antennae. 
They inhabit all parts of the world. 
Key to the Genera of Crvptocephalin®. 
A. Antenna? short, terminal joints widened. 
a. Scutellum invisible from above 
b. Scutellum visible. 
a' . Eyes nearly, sometimes completely, 
touching above 
b' . Eyes not very closely approximate, 
never touching 
B. Antennae long and filiform, joints not or 
scarcely widened. 
a. Thorax transverse. 
a . Thorax closely fitted to base of 
elytra, base not margined 
b'. Thorax not closely fitted to base of 
elytra, base narrowly margined . . 
b. Thorax conical, narrowed in front 
Dioryctus, p. 176. 
Ccenobius, p. 182. 
Melixanthus, p. 267. 
Cryptocephalus, p. 192. 
Pachybraciiys, p. 265. 
Melinobius, p. 269. 
Genus DIORYCTUS. 
Dioryctus, Sufr. Linn. Ent. xiv, 1860, p. 3 ; Wcise, JJeut. ent. Zeit. 
1903, p. 33 
Atropidius, C'hapuis, Gen. Coleopi. x, 1874, p. 175. 
Type, B. porcnlus, Suffr., from Ceylon. 
Range. India; Japan; Malay Archipelago. 
