480 Mr. I. P. Pascoe on Spherion and Mallocera. 
elytra are flattish, terminating in a median spine; the femora 
are rather fusiform than clavate, and the basal joint of the pos- 
terior tarsi is as long as the rest together. The type is a toler- 
ably large insect, and is the Spherion cinerascens of Dejean’s 
Catalogue, but has never, I believe, been described. 
Mephritus cinerascens. 
M. brunneus, pube subtili cinerea omnino indutus. 
Hab. Rio Janeiro. 
Reddish brown, everywhere covered with a delicate ashy or 
ashy-grey pubescence ; head and prothorax nearly free from 
punctures. Scutellum semicircular; elytra rather closely and 
finely punctured, towards the apex impunctate ; antenna, tibia, 
and tarsi blackish. Length 14 lines. 
CASTIALE. 
Antenne clongate, art. 3°-6™ apice spinosis ; tuberibus antenniferis 
horizontalibus. 
Prothorax breviter ovatus, subdepressus. 
Femora tenuiter fusiformia, quatuor posteriorum apice bispinoso. 
In this genus the femora are slender and fusiform, the four 
posterior bispinous at their apices; the head has a little more 
muzzle than usual, and the antennary tubers are projecting in 
front, and divided by a narrowly impressed line; the antenne 
are much longer than the body, and the third to the fifth joints 
are grooved and spined, as in the preceding genus; the pro- 
thorax is oblong, with a slightly raised central line, and four 
obscure tubercles on the disk ; the elytra terminate in an exterior 
spine; the tibiz and tarsi are slender, the basal joint of the 
posterior tarsi not longer than the two following. The type is 
a beautiful insect bearing the name of “ Spherion elegantulum, 
Buq.,” in the British Museum collection. 
Castiale viridipennis. 
C. rufescens; elytris leete viridibus ; antennis pedibusque fuscis. 
Hab. Columbia. 
Brownish red, clothed with scattered pale-greyish hairs; head 
sparsely punctured ; prothorax transversely corrugated, the disk 
with four flattish unicolorous tubercles, and a short central ele- 
vated line; scutellum semicircular; elytra rich green, shining, 
minutely shagreened, the scattered punctures each giving 
origin to a long slender hair; body beneath reddish; legs and 
antennee blackish, with scattered slender hairs, the latter nearly 
twice as long as the body. Length 7 lines. 
