VOL 54, NO. 1, JANUARY 1978 
7 
sely covered with long, white hairs, except glabrous patch at midline of metasternum. 
Anterior tibia distinctly tridentate, not as strongly as previous species (Fig. 13). 
Variation in paratypes: Length 16-22 mm, width 5.5-7.6 mm. There is some variation in 
the development of the third (basal) tibial tooth, but in all cases, there is clearly a third 
tooth present. Variation in scale density varies the elytral appearance from that of gla¬ 
brous (although scales are present) to distinctly vittate, with vittae extending nearly to 
elytral apex. 
Female: Unknown. 
The name is in recognition of the contributions of Mr. and Mrs. R. W. L. Potts, who first 
drew my attention to this species. 
Holotype male (CAS #13101) and 145 male paratypes: Texas, Ward Co., Monahans Sand¬ 
hills State Park, VI-6/7- 1977, Potts and Potts collrs.; 184 additional male paratypes, same 
locale, as follows: V-28-1975, Potts and Potts (29); VII-1977, R. Lenczy (8): VI1-15/16-1975, 
dead at light, G. H. Nelson (36); VII-23/24-1976, ultraviolet light, G. H. Nelson (III). (Depo¬ 
sited in CAS, USNM, Lenczy, Nelson, Potts, Hardy.) 
Diagnosis: P. pottsorum is another of the species with tridentate 
anterior tibiae ( hammondi, cavifrons, squamiventris, anteronivea and 
erratica, above). From all of these species except squamiventris, pott¬ 
sorum may be readily separated by the small size (all other species 
greater than 22 mm in length). P. pottsorum may be distinguished 
from the closely related squamiventris, by the longer antennae (1.5 
times basal segments, in squamiventris vs. 2 times, or more, in pott¬ 
sorum), presence of clypeal setae, lighter elytral color, impressed 
maxillary palp, longer, thinner squamae on prothorax, and testaceous 
legs. 
PoSyphylla momahansensis Hardy, new species 
(Figs. 9, 10, 15) 
Holotype male: Length 26 mm, width 8.5 mm. integumentary color testaceous to ruto- 
testaceous except for piceous vertex, ocular canthi, clypeal suture, lateral clypeal 
margins. Apical clypeal margin reflexed; laterally, medially angulate. Reflexed clypeal 
margin, lateral margins, ocular canthi, lateral portions of front, vertex with close, 
recumbent elongate white scales. Medial portions of clypeus, front with few scattered 
white scales intermixed with long, erect testaceous hairs. Thorax trivittate basally; 
coarsely punctured, each puncture with a recumbent scale or single long erect testa¬ 
ceous hair. Punctures finer, closer anteriorly at midline. Elytra noticably vittate (Fig. 10), 
with scales smallerthan thoracic scales. Pygidium without scales, with numerous short, 
semirecumbent testaceous hairs. Apical pygidial margin reflexed. Antennal club nearly 3 
times length of basal segments (straight line measure). Maxillary palp cylindrical in cross 
section, without flattened area. Anterior tibia bidentate. Thorax ventrally with dense, erect 
testaceous hairs. Ventral abdominal segments with sparse, recumbent, small white 
scales. 
Variation in paratypes: Length 21-27.5 mm, width 7.5-9.5 mm. Most conspicuous 
variation from the description above is in the shape of the reflexed anterior clypeal 
margin, which may lack the medial clypeal angulation, and have the lateral angles more 
rounded; and the anterior tibial teeth, which may be bidentate (as above) to strongly 
tridentate. The thoracic vittae may be more clearly developed than the type, and the elytral 
vittae occasionally may be faint, but are, in all specimens examined, clearly discernable 
throughout their length. 
Female: Unknown. 
The name refers to the type locality, Monahans, Texas. 
Holotype male (CAS #13100) and 39 male paratypes: Texas, Ward Co; Monahans 
Sandhills State Park, VI-6/7-1977, Potts and Potts. 98 additional paratypes, same 
