296 HEMIPTERA-HETEROPTERA. 
Dr. Aurivillius has recently sent me for examination a very interesting Reduviid of 
the subfamily Acanthaspidine from Costa Rica, too late for insertion in its proper 
place, after the genus Lamus, antea, p. 211. We therefore place it here, at the end 
of the Reduviide. 
VOLESUS, n. gen. 
Head short, small, with the antenniferous tubercles obliquely projecting in front, cylindrical, and unarmed ; 
eyes rather small, transverse if viewed from the side; ocelli placed a little behind the usual transverse 
groove; antenne inserted at the apex of the antenniferous tubercles, joint 1 rather stout, much longer 
than the head, 2 more slender and a little longer than 1, 3 and 4 very slender, 3 not half the length of 2 
and twice as long as 4. Pronotum trapezoidal, the anterior lobe very short. Scutellum produced into a 
stout cylindrical process at the tip. Membrane with the outer area a little longer than the inner one. 
Abdomen broad, with wide connexival margins. Rostrum slender, joints 2 and 3 equal in length, received 
into a broad deep groove in the prosternum. Prosternum narrowly produced and declivous between the 
anterior coxe, and armed with two blunt, compressed, dentiform processes in front, these extending 
forwards from the ridge bordering the rostral groove on each side posteriorly. Legs comparatively 
slender, each of the femora slightly compressed before the apex beneath; tarsi 3-jointed, claws simple. 
Body broad and robust. 
This genus is almost intermediate between Spheridops and Veseris: the antenniferous 
processes are unarmed, the second and third joints of the rostrum are subequal in 
length, and the first antennal joint is longer than the head, as in Veseris; but the 
prosternum is not obtusely rounded posteriorly as in that genus (following Stal’s 
description), but narrowly produced as in Sphwridops. The head is very small. 
1. Volesus nigripennis, n. sp. (Tab. XVIII. fig. 14, 2.) 
2. Opaque above, slightly shining beneath, black ; the pronotum sanguineous, with two anteriorly converging 
vittee on the disc of the posterior lobe and two faint vitte towards the sides, all connected in front, and the 
median portion of the anterior lobe, black ; the scutellum bordered with sanguineous behind, the apical 
process ochraceous ; the abdomen transversely banded with sanguineous, the sixth segment in great part 
red; the prosternum with a red streak on each side in front of the anterior coxe ; the legs blackish, the 
tarsi fusco-testaceous ; the body beneath, the antenne, and legs shortly pilose, the antennal joints 2-4 
with longer, projecting hairs. Head, pronotum, and scutellum coarsely rugose ; the pronotum narrowly 
sulcate down the middle of the posterior lobe, the lateral angles produced into a blunt tooth, the anterior 
lobe nodose at the sides behind, the anterior angles obtuse. The under surface densely, transversely 
rugulose, the venter smoother along the middle. 
Length 19, breadth 82 millim. 
Hab. Costa Rica (BSovallius, in Mus. Holm.). 
One specimen. 
NoreE.—In my enumeration of the species of Apiomerus, antea, pp. 230-243, 
A. (Herega) rufipennis, Fallou, from Mexico (Le Nat. 1889, p. 131) was accidentally 
omitted. It is probably a variety of A. crassipes (Fabr.) or of A. spissipes (Say): 
the description is almost useless for the purposes of identification, colour only being 
noticed. 
