282 
Psyche 
[December 
ites, the sixth short and very broad, the corresponding tergite only 
half its breadth. The sternites without sexual modifications. 
Genitalia (Fig. 2B, C). In general appearance most nearly re- 
semble those of PI. reppensis (Hbst.). The median lobe is slightly 
longer than wide and is almost symmetrical. The free portion of a 
paramere is one-sixth longer than the median lobe but only half as 
long as the portion enclosed within the basal ring which is twisted 
through an arc of 180° and which protrudes beyond the basal ring 
and appears to provide a surface for muscle attachment. The sipho 
is normal in form, slightly modified at apex. 
Female: Length 3. 1-3.4 mm. Form and punctation essentially as 
in male. Head dark beneath and with a transverse dark stripe on 
vertex. Pronotum largely dark, the extreme anterior margin and the 
anterior angles pale. Prosternum dark, propleura, mesepipleura, 
elytral epipleura and lateral margins of abdominal sternites pale. 
Genitalia (Fig. 2D). Hemisternites broad and rounded, styli 
very small but with relatively long and conspicuous setae. Bursa 
copulatrix broad at base, rapidly tapering to meet the sperm duct of 
large diameter. Infundibulum absent. Receptaculum seminis is com- 
pound ; the basal portion, which corresponds to the nodulus, ramus, 
and lower part of cornu, is pear-shaped and of moderately firm tex- 
ture. There is no appendix at its apex, as in most of the species of 
Hyper as pis. Accessory gland pore located adjacent to the attachment 
of the sperm duct. The apical portion, which appears to correspond 
to the apical portion of cornu, is retort-shaped and is joined to the 
basal portion at about the middle of its length. 
Holotype — a male, head appendages, legs, genitalia and abdominal 
sternites on slide, from Veracruz, Ver., Mexico, May 1956, N. L. 
H. Krauss, (U. S. N. M. no. 69331 ). Paratypes — a male, same data 
as holotype, (K. U.) ; a female, genitalia and abdominal sternites on 
slide, from Temascal, Oax., Mexico, Jan. 27, 1964, reared from 
larva in thorn of Acacia cornigera infested by Pseudomyrmex fer- 
ruginea F. Smith (U. S. N. M.) ; a female, from 2 mi. W. of 
Coatepeque, Quetzaltenango, Guatemala, Jan. 12, 1965, reared from 
larva in thorn of Acacia hindsii infested with Pseudomyrmex fer- 
ruginea, (K. U.). 
This species differs from all Hyperaspis known to me in two, per- 
haps significant, characters. ( 1 ) The antennal club has the terminal 
(nth) segment free and considerably longer than the tenth, which 
in turn is as long as the ninth. In other Plyperaspis, both those with 
ten-segmented or eleven-segmented antenna, the terminal segment is 
very small and more or less buried in the apex of the penultimate 
segment, which is much shorter than the antepenultimate segment. 
