1961] 
Nutting and Gurney — Genus Vostox 
47 
broadly rounded and beset with a few widely spaced tubercles, 
inner face thus scarcely concave for more than half its length ; 
pygidium as in Fig. 12, but scarcely diagnostic. 
Vostox bru n n eipen n is (Serville) 
Dorsal surface of anal segment comparatively smooth ; dorso- and 
ventro-internal margins of forceps prominent and closely set 
with small tubercles (almost crenulate), inner face thus dis- 
tinctly concave as a longitudinal groove nearly to tip ; pygidium 
as in Fig. 4. Vostox excavatus , new species 
Vostox excavatus, new species 
Figures 1-8 
Description. Male (holotype) : Size medium, form usual for genus; 
body depressed with sides of abdomen (except for slightly narrower 
segments 1 and 10) subparallel and as wide as elytra; abdomen 
minutely punctulate above and below, less so on segments 1-3, in- 
creasingly so posteriorly, body practically smooth elsewhere; fine, 
short setae rather densely covering labrum, antennae and limbs, but 
sparse on remainder of body including forceps, elytra and wing scales ; 
a few longer setae on posterior margin of head, anterior margin of 
pronotum, cephalic faces of femora, near bases of coxae, and on the 
posterior margins of all abdominal sterna except the last. 
Head cordate in dorsal outline, with greatest width through the 
eyes equal to the median length ; occipital margin broadly and obtusely 
emarginate ; caudal angle of genae broadly rounded ; eyes not especially 
prominent, slightly shorter in length than the postocular portions of 
genae ; eedysial cleavage lines very faintly impressed ; antennae broken, 
one with 1 1, the other with 12 segments, the first segment equal to the 
sixth in length, considerably shorter than the fourth and fifth together. 
Pronotum subquadrate, with greatest width at caudal third nearly 
equal to its median length, cephalic margin produced mesad to form 
a narrow cervical flange, laterocephalic angles obtuse and narrowly 
rounded, lateral margins straight and diverging slightly to the broadly 
rounded caudal margin, anterior two-thirds of disc convex with 
lateral margins flaring upward, thus forming shallow furrows which 
broaden and become confluent with the flattened posterior third of 
disc; median longitudinal sulcus moderately impressed on convex 
portion of disc, but becoming obsolete in posterior third. 
Elytra with median length 2.1 times the greatest width of a single 
elytron ; lateral margins nearly straight and subparallel, humeral 
angles broadly rounded, distal margin subtruncate. Exposed portions 
