PAN-PACIFIC ENTOMOLOGIST 
Vol. 55, No. 1, pp. 57-60 
A NEW APTEROUS SPECIES OF ARADIDAE FROM 
KENYA (HEMIPTERA) 
Nicholas A. Kormilev 
Entomology, Bishop Museum, Honolulu, HI 
The genus Usumbaraia Kormilev, 1956, was established for reception of 
two apterous species, Usumbaraia ampliata Kormilev and U. elongata 
Kormilev, both from Tanganyika. The third species is now described from 
Kenya. The three species are not very closely related, differing by the shape 
of head, pronotum and the tip of abdomen. The new species is distinctly 
pilose, whereas the first two are naked. 
All measurements were taken by micromillimeter eyepiece, 25 units = 1 
mm. In ratios the first figure represents the length and the second the width 
of the measured portion. 
Usumbaraia arnaudi, new species 
(Figs. 1-2) 
Female .—Elongate subtriangular, widening backward until connexivum 
V, then narrowing; postero-exterior angles of connexiva VII produced back¬ 
ward as large, flat, rounded lobes. The whole body sparsely covered with 
fine, rusty, decumbent hairs. Apterous. 
Head .—Longer than its width across eyes (75:50). Anterior process very 
long and deeply cleft, projecting beyond tip of antennal segment I; clypeus 
raised, Vi as long as the whole anterior process; genae very long, cleft, with 
diverging tips. Antenniferous spines dentiform, very strong and diverging. 
Eyes small, semiglobose, protruding. Postocular borders straight and con¬ 
verging backward, terminating with 2(1 + 1) strong, acute spines, directed 
sideways and slightly backward. Hind border behind postocular spines 
rounded and festooned because of rough, round granulation. Vertex raised 
in the shape of rhomboid, deeply incised anteriorly and rounded posteriorly, 
with Y-shaped, deep, median sulcus, extending from antenniferous spines 
to hind border of head. Infraocular callosities rounded anteriorly and ta¬ 
pering posteriorly, depressed along inner and outer borders. Antennae 1.79 
as long as width of head across eyes (89.5:50); antennal segment I stout and 
clavate, II tapering toward base, III barely tapering toward base, IV fusi¬ 
form; relative length of antennal segments I to IV are: 30:14:31:14.5. Labium 
preapical, arising from split atrium and not reaching hind border of labial 
groove, which is closed posteriorly. Ventral side of head laterad of labial 
