STRONGYLUS.—MECYLLODES. 307 
Antenne with large, broad club, the basal joint of which is not so long as it is broad. 
Head rather coarsely, the thorax finely and sparingly punctured. LElytra with regular 
series of fine punctures, interstitial punctuation almost absent. 
This is a true Sérongylus, though it has the prosternal process small and narrow; in 
size and outline §. equalis more resembles the species of the next genus. Only one 
specimen is extant from each locality. 
7. Strongylus mimetes, sp. n. (Tab. XI. fig. 17.) 
Rotundatus, valde convexus, nitidissimus, rufo-ferrugineus, concolor. 
Long. 3 millim. 
Hab. Panama, Volcan de Chiriqui (Champion). 
There can be no difficulty in distinguishing this insect from S. @qualis owing to the 
difference in colour; in other respects the two are very much alike, though there is no 
doubt S. mimetes is a distinct species, as it differs from its congeners in not having the 
prosternum carinate. Az first sight it more resembles Mecyllodes seriatus, from which it 
differs, apart from its structural characters, in having the club of the antenne pallid 
and the serial punctuation of the elytra very fine. The elytra have almost no intersti- 
tial punctuation, and the punctuation of the thorax is fine and distant. The prosternum 
is flatter in this species than it is in the allies, and only very obscurely carinate along 
the middle. 
MECYLLODES, gen. nov. 
Corpus rotundatum, convexum, absque pubescentia. Labrum sat magnum, integrum. Mandibule breves, 
sub labro condite. Palpi labiales breves, sat crassi. Pedes omni parum distantes, crassi; tarsis fortiter 
dilatatis. 
The members of this genus are extremely similar to Strongylus (=Cyllodes, Er.) in 
appearance, but have the middle and hind legs only slightly separated. The prosternum 
is constructed as in Strongylus; the metasternum is not so much produced in front 
in the middle; the mesosternum is feebly carinate, and differs also from that of 
Strongylus inasmuch as it descends in the middle to the level of the metasternum, and 
forms, in fact, a very fine margin in front of it; in Strongylus the descending part of 
the middle of the mesosternum is furcate at the extremity, and only the points of the 
fork reach the level of the metasternum, where they appear as two very minute pieces 
placed one on each side of the angle of the metasternum, close to the coxa. The 
antennary grooves are formed as in Strongylus, and so also are the parts of the mouth, 
as far as I can see them. 
In addition to the two here described, I have a third species in my collection which 
I have no doubt is a Brazilian insect. 
