550 Mr. Waterhou@on some South American 
7. Thyridium lineatum, Murray. 
This species is described by Mr. Murray (Edinb. New 
Phil. Journ. v., 1857, p. 225) under the genus Chlorota, 
but it appears to me to be better to confine that genus 
to those species which have only a very short sternal 
process. 
D. The following species has all the claws simple, but 
the outer anterior claw is more dilated at the base. 
8. Thyridium punctiventre, n. 8. 
Viridi-olivaceum, lucens, oblongum, depressum ; tho- 
race antice angustato, lateribus flavis, elytris crebre punc- 
tatis ad apicem rugulosis, corpore subtus pygidioque albo- 
setosis. Long. 8} lin. 
Front part of the head sparingly punctured; the 
clypeus gradually more thickly punctured to the front 
margin, where it is rugulose, tinted with yellowish. 
Thorax convex, 5} millimetres long in the middle, broadest 
at the posterior angles, gradually narrowed to rather in 
front of the middle, and then more obliquely narrowed 
to the anterior angles, which are rather prominent and 
acute ; surface sparingly and most delicately punctured, 
more closely, but very obscurely, punctured towards the 
sides; the base is broadly but very slightly lobed in the 
middle, nearly straight on each side. Scutellum a curvi- 
linear triangle, 2 millimetres long and 2 millimetres 
broad. Elytra rather depressed, broadest about the 
middle, very obtuse at the apex, rather strongly and 
moderately thickly punctured, the punctures of unequal 
size, the apical margins rugulose, margin a little incras- 
sate below the shoulder, and with an impressed line 
above the margin; subapical callosity obtuse, but very 
distinct. Pygidium coarsely rugose, and beset with long 
stiff hairs. Sternal process moderately long and thick, 
not inflated at the apex, but (viewed laterally) the point 
next the anterior cox is produced over the coxe, as 
is common in many of the species. Metasternum 
strongly punctured (except in the middle), and at the 
sides rugulose, as well as the episterna; pilose. Legs 
yellowish green. Abdomen with a line of strong elon- 
gate punctures all across each segment, each puncture 
with a short stiff whitish hair. 
Hab. Ecuador, Chiguinda (Buckley). 
