1977] 
Thayer — Redescription of Xenicopoda 
145 
pronotal margin to midline of prothorax. Procoxa and protro- 
chantin very strongly and sharply carinate externally. Prosternum 
with short acute process barely extending between procoxae ex- 
ternally. Mesosternum not longitudinally carinate, having a fairly 
even surface with no distinct depressions fitting against procoxae; 
with a short rounded process between mesocoxae. Mesocoxae 
slightly separated, but meso- and metasternum not touching exter- 
nally. Metasternum without external process between mesocoxae, 
with a short pair of processes between metacoxae. Metacoxa tri- 
angular in ventral view, with posterior surface slightly excavate. 
Apex of coxa slightly explanate laterally, overlapping part of the 
trochanterofemoral joint when the leg is in a retracted position. 
All tibiae with vague row of spines along part or all of outer face. 
Tibiae and tarsi slender except male prolegs as described below. 
Metatarsus about three-fourths as long as metatibia, first four seg- 
ments subequal in length, fifth about twice as long as each of first 
four. Pair of empodial setae between claws on all tarsi, generally 
about half as long as claws. 
Elytra together about 1.1 times as long as wide; without micro- 
sculpture between punctures; probably extending to about the apex 
of tergite 4 in life. Elytral epipleuron delimited by a distinct lateral 
keel. Wings fully developed, with a typical omaliine folding pat- 
tern (my unpublished data). 
Abdomen with fine reticulate microsculpture on dorsal and ven- 
tral surfaces; intersegmental membranes with brick-wall pattern 
(with occasional irregularities) typical of Omaliinae (see Hammond, 
1971); sternites of segments 2 and 3 apparently without a keel be- 
tween metacoxae; tergites 2 and 3 somewhat sclerotized, 4 and fol- 
lowing more so; tergites 4 and 5 each with a pair of small patches 
of medially-directed microtrichia (“pruinose” or “tomentose” spots 
of authors; see fig. 4); only segments 3 and 7 bearing paratergites 
(“margined segments”), segment 2 with sternites extending onto 
dorsal surface, other segments with narrow membranous joint di- 
Figs. 1-8. Xenicopoda helenae Moore and Legner. 1-2. Mandibles; 1., ventral; 
2., dorsal view. 3. Head, dorsal view (large circles = ocelli, small circles = dorsal 
tentorial pits). 4. Abdomen, segments 2-8 and (male) genital segment, dorsal view. 
5. Eighth abdominal sternite and external female genitalia, ventral view. 6-8. Male 
genitalia; 6., Genital segment, ventral view; 7., Aedeagus (as positioned within ab- 
domen), dorsal view; 8., Genital segment, dorsal view. Membranous areas of geni- 
talia stippled. Scale line = 0.5 mm. 
