480 Mr. P. P. Pascoc on Sphserioii and Malloccra. 



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 Sphcerion cinerascens of Dejean's 

 Catalogue, but has never, I believe, been described. 



Mephritus cinerascens. 

 M. brunneus, pube sub till cinerea omnino indutus. 



Hah. 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 ; antennse, tibiae, 

 and tarsi blackish. Length L4 Hnes. 



Castiale. 



Antenna elongatse, 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 antennae 

 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 tibiae 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 " Splmrion elegantulum, 

 Buq.,^^ in the British Museum collection. 



Castiale viridipennis. 

 C. rufescens ; ely tris Isete viridibus ; antennis pedibusque fuscis. 

 Hah. 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 

 antennae blackish, with scattered slender hairs, the latter nearly 

 twice as long as the body. Length 7 lines. 



