206 EMBRIK STRAND, 
median segment as long asthe pronotum, broadened posteriorly. Pleurae 
shining and almost smooth. Abdomen much broader than the thorax, 
shining, with a few scattered punctures; the first segment not much 
narrowed, the apical margin raised with a shallow groove before it; 
the second segment opaque at the base, the apical margin strongly 
raised with a broad groove before it, the intervening space rugose 
between two transverse carinae, the basal one low, the apical one 
hieh. Pygidium small; the dorsal plate very narrow, deflexed pos- 
teriorly and pointed, the posterior surface very short and small, 
subconcave with raised margins; the ventral plate broader, rounded 
at the apex, deeply emarginate above for the reception of the dor- 
sal plate and produced upwards on each side into a pointed process, 
the surface of the ventral plate obscurely longitudinal striated; a 
small compact tuft of bright orange hairs on each side of the dor- 
sal plate. Fifth ventral segment loneitudinally rugose. 
Black; mandibles, except at the apex, antennae, celypeus, legs, 
pygidium and fifth ventral segment ferruginous; the coxae and tro- 
chanters black; a large spot without and above the base of the an- 
tennae, the apex of the scutellum, the lateral margins of the head, 
a band on each side of the median segment from the base to the 
apex, a very broad transverse band on the first dorsal abdominal 
segment, a spot on each side of the second, a broad transverse band 
interrupted in the middle on the third and fourth, a narrower band 
emarginate on each side posteriorly on the fifth and a line on all 
the femora beneatlı yellow. 
Length 13—15 mm. 
Hab. Asuncion, Paraguay (Anısıts).. 22 in cop. July; San- 
Bernardino, Paraguay (FIEBRIG). 
Described from 1 male and 5 females. 
Very near E. avida Turn. especially in the male, which may 
be distinguished by the truncate inner tooth of the mandibles, the 
colour of the two apical abdominal segments, and the claspers which 
are more gradually narrowed to the apex in E. avida. The female 
is easily distinguished by the smaller dorsal plate of the pygidium, 
the longer median segment and the tufts of hairs on the front. The 
species is also near Thynnus consobrinus Kuus but the angles of 
the elypeus are produced into short spines in that form. 
