182 EnmBRIk STRAND, 
A pair in the British Museum. Also in the Oxford University 
Museum with the MS name semicinctus apparently given by Rerp». 
The male closely resembles Zricolor Spm., and chilensis Sauss., 
but the hypopygium is differently shaped. The female is different 
and resembles that of Ornepetes albonotata ANDRE, but the pronotum 
is very different. 
Scotaena polistoides BURM. 
(PLAN 10217), 
Thynnus polistoides BURMEISTER MS. 
&. Mandibles bidentate, not elbowed, the inner tooth not 
broadened or truncate Cl]ypeus produced, shallowly and rather 
narrowly emarginate at the apex and bidentate, the teeth slender 
and acute; a slight depression in the middle before the apex. 
Antennae nearly as long as the thorax and median segment combined, 
the apical joints feebly arcuate. Head finely and very closely punc- 
tured, the interantennal prominence feebly bilobed. Posterior ocelli 
twice as far from each other as from the anterior ocellus and further 
from the eyes than from each other. The whole of the head, the 
sides of the thorax and of the abdomen clothed with short grey 
pubescence. Pronotum a little narrower than the head; the anterior 
margin slightly raised, with a transverse shining groove behind it. 
Mesonotum and scutellum rather sparsely punctured, more finely and 
closely between the longitudinal furrows on the mesonotum; the 
inedian segment finely and closely punctured, obliquely depressed to 
the apex, rounded at the sides. Abdomen elongate, slightly longer 
than the head, thorax and median segment combined, tapering a 
little at the extremities, finely punctured; the first segment with a 
minute tubercle on each side before the middle and a deep longi- 
tudinal sulcus from the base; segments 2—4 with a shallowly 
impressed transverse line near the base. Hypopygium blunt at the 
apex and scarcely projecting beyond the dorsal segment, not very 
narrow. 
Black; the mandibles at the base, elypeus, two minute spots 
between the antennae, the margins of the eyes interrupted on the 
summit, a transverse line on the vertex, the margins of the pronotum, 
tegulae, a quadrate spot on the mesonotum, a large spot on the 
mesopleurae below the anterior wings and a minute one before the 
intermediate coxae, a very large spot on the scutellum and a small 
