1938] 
North American Nitidulidae 
161 
County, California, Aug. 6, 1906, E. N Erhrkom collector; 
both in the Van Dyke collection of the California Academy 
of Sciences. 
This species, apparently closest to falli n. sp., is distinc- 
tive in its oblong form. It is less convex than brunnescens, 
punctata n. sp., and falU n. sp. but more convex than the 
other species. 
Lobiopa undulata (Say) 
Nitidula undulata Say, 1825, Journ. Acad. N. S. Philad., 
5: 179. 
Soronia undulata Horn, 1879, Trans. Am. Ent. Soc., 7 : 307. 
Lobiopa undulata Sharp, 1890, Biol. Centr.-Amer. Col., vol. 
2, pt. 1, p. 321. 
This species varies considerably in color, shape, and size 
(3. 6-5.3 mm.) . It is found at sap in the spring and autumn 
and hibernates beneath logs. The range is Maine and Michi- 
gan to Florida, Texas, and “northern Sonora” (Sharp). 
Sharp’s record may refer to the following new species. 
Lobiopa falli new species 
Fig. 7. 
More oval than oblong; feebly convex. Above dull rufo- 
piceous with the margins of the prothorax and elytra rufo- 
testaceous. Also there is on the upper surface faint, irregu- 
lar, pale maculae, in particular usually a transverse pale 
band at the posterior third extending half way across each 
elytron. This band is more evident in insularis and undu- 
lata. Beneath rufo-piceous with the legs paler. Head with 
a few, thick, erect setae; pubescent; rather coarsely com- 
pactly punctate; alutaceous; with a broad, transverse im- 
pression between the eyes; lobes over the insertion of the 
antennae very prominent, more so than in the other North 
American species. Eyes of ordinary size. Labial palpi 
incrassate. Prothorax as emarginate anteriorly as in setosa 
and undulata, more so than in insularis, in which the pro- 
thorax is more emarginate than in oblonga n. sp. Prothorax 
with lateral margins broadly explanate, evenly and flatly 
arcuate, narrowing shortly before the acute hind angles; 
