50 Natura. History BuLuETIN. 
TrimioPpLEctus, Brendel. 
TABLE OF THE SPECIES OF ,TRIMIOPLECTUS, 
Prothorax narrowing toward the base, to the width of the rather thick 
neck. 
Vertex with the sulcus wanting or but faintly indicated; occipital 
fovez small, isolated. - - - - obsoletus 1. sp. 
Vertex with deep fovez connected by a deep, arcuate, sulcus. 
E . : = - See §- 5 2 = arcuatus, 
Prothorax slightly narrowed toward the base. 
Prothorax transverse, sides parallel in the middle; posterior angles 
broadiy rounded; head as wide as the prothorax. - ruficeps, 
Prothorax wider than long, sides convergent posteriorly; basal 
fovee smaller, and connected by aconspicuous sulcus. Head 
very much narrower than the prothorax - capitulum. 
T. oBsoLEeTus,n.sp. Yellow, pubescence fine, sparse; sur- 
face impunctate or with obsolete punctures visible only under 
a magnifying power exceeding sixty diameters; body convex. 
Length 1.2 mm. Plate XI., Fig. 105. Plate XII., Fig. 123. 
H[ead, including the mouth, forming an equilateral triangle 
with arcuate corners; vertex flat, with two round fovee in a 
line before the middle of the eye, the latter situated far down 
on the sides; frontal margin straight with an obsolete trans- 
versely impressed line between the small antennal tubercles, 
not connected with the fovez; occiput sinuate. Antenne 
twice as long as the head, first and second joints thicker, 
cylindrical; ninth transversely oval, as wide as the second; the 
tenth larger, one-third wider than long; last joint twice as wide 
as the tenth and as long as the three preceding together. 
Prothorax very convex, very little longer than wide, sides 
arcuate to the lateral foveze, thence straight to the base; the 
transverse sulcus is one-fourth from the base, deep, straight, 
connected with a triangular impression in the middle. /ytra 
convex, sutural lines straight, recurrent at the base, discal lines 
recurrent for half the length, no intermediate basal punctures. 
Abdomen convex, border moderate, basal dorsal segment 
longer than any of the others; at the base is a transverse, 
pubescent, linear, depression including one-half of the seg- 
