4 
THE PAN-PACIFIC ENTOMOLOGIST 
ping oval white scales, which obscure virtually entire thoracic integument. Few scattered 
erect hairs at anterior margin of prothorax. Scutellum contiguously covered with ova) 
white scales. Elytra anteriorly, along suture, lateral margin and apically, with scattered to 
contiguous oval white scales. Ventral thoracic segments with sparse, medium, gray to 
white erect hairs, less dense than in most Polyphylla. Apical segment of maxillary palp 
short (.7 times length of basal two segments), stout (length 3.2 times width), with small, 
slightly concave area dorsally. Antennal club 2 (linear measurement) or 2.8 (along curve) 
times length of basal segments. Anterior tibiae strongly tridentate (Fig. 12). 
Variation in paratypes: Length 21-29 mm, width 7-10 mm. Except for specimens which 
have been abraded or greased, the only notable difference is in the elytral scalation, 
which may be reduced, or may not appear vittate. 
Female: Unknown. 
The name refers to the snow covered appearance of the anterior portion of the insect 
(Fig. 4). 
Holotype male (CAS #13097) and two male paratypes: California, Inyo Co., Saline Valley 
Dunes, VI-13-1976 D. Giuliani coll. Thirty-three additional paratypes, all Saline Valley, as 
follows: Dunes Blacklight, #8, VII-8-1976 D. Giuliani (3); Dunes #11, D. Giuliani VIII-10-1976 
(1); VI-1-1974 N. Rulien (1); Dunes, VI-10-1973, J. M. Cicero (21); Dunes, V-18-1973, J. M. 
Cicero (6); Lake, V-18-1973, J. M. Cicero (1). (Deposited in USNM, CAS, CDA, Cicero, How- 
den, Nelson, Potts, Rulien.) 
Diagnosis:/ 3 , anteronivea, by virtue of the strongly tridentate anterior 
tibiae (Fig. 4), would key to couplet two in Fall’s 1928 key, which in¬ 
cludes the species cavifrons and hammondi. P. squamiventris Cazier 
would also run to that portion of the key. P. cavifrons has the antennal 
club less than twice as long as the basal segments, hair-like dorsal 
scales, less acute clypeal angles, and a more densely pubescent 
ventral thoracic area than anteronivea. P. hammondi has a vittate 
thorax, the anterior angles of the clypeus are narrower than the lateral 
margins (clypeus of anteronivea is widest at angles), and the front and 
clypeus are more pubescent than in anteronivea. (It should be noted 
that although both of the keys by Casey and Fall use the tridentate 
anterior tibiae of hammondi as significant, in series, Arizona speci¬ 
mens range from strongly tridentate to weakly tridentate to bidentate. 
There is, additionally, an undescribed species near hammondi from 
central Mexico with strongly tridentate anterior tibiae.) P. squamiven¬ 
tris has an antennal club less than 1.5 times the length of the basal 
segments, a pronounced pronotal vittae, and unimpressed maxillary 
palp, which distinguishes this species from anteronivea. P. anter¬ 
onivea is easily recognized at first glance by the unique vestiture 
(Figs. 3, 4). P. anteronivea is related to the following species. 
Polyphylla erratica Hardy, new species 
(Figs. 5, 6,14) 
Holotype male: Length 26.5 mm, width 9.7 mm. Integument of head rufous, except 
piceous vertex, anterior, lateral clypeal margins and angles. Thoracic integument rufous. 
Elytra, ventral surfaces, pygidium, appendages rufo-testaceous; antennal club testa¬ 
ceous. Clypeus quadrate, margins strongly reflexed, anteriorly bisinuate, outer angles 
sharp, nearly spinose (Fig. 14). Clypeal disc with close to contiguous oval white scales; 
