1938 ] 
North American Nitidulidae 
159 
Lobiopa setosa Harold 
Fig. 5. 
Lobiopa setulosa Leconte (non Erichson), 1863, Smiths. 
Misc. Coll., 4 : 63. 
Lobiopa, setosa Harold, 1868, Col. Hefte, 4: 104. 
Soronia undulata (pars) Horn, 1879, Trans. Am. Ent. Soc., 
7: 307. 
Soronia substriata Hamilton, 1893, Can. Ent., 25 : 306. 
Dr. Hugo Kahl kindly sent me the type of substriata 
Hamilton. After comparison with the type in the Leconte 
collection, substriata turns out to be a synonym of setosa. 
The type of substriata is one millimeter longer than Leconte’s 
type, darker above, with slightly more pointed elytra. Since 
individuals in this genus are very variable, these differences 
are unimportant. This rare species tends to be broader, 
more depressed, duller, and darker than its closest relative 
undulata. Specimens have been seen ranging from Massa- 
chusetts to Utah, north to Kamloops, B. C., March 21. In 
Pennsylvania it has been found in May under the bark of 
maple (Acer rubrum) . 
Lobiopa oblonga new species 
Fig. 6. 
Length twice the width, oblong oval, feebly convex. Above 
dull rufo-piceous with faint, irregular, pale maculae. Mar- 
gins of thorax and elytra rufo-testaceous. Beneath, includ- 
ing antennae and legs, dark rufo-testaceous. Head pubes- 
cent ; closely, finely punctate ; very broadly, shallowly 
impressed between the eyes. The lobes over the insertion 
of the antennae more prominent than in all the other North 
American species except falli n. sp. Labial palpi incrassate. 
Prothorax more emarginate anteriorly than brunnescens 
but less so than the other North American species; with 
broadly explanate, flatly arcuate lateral margins ; hind 
angles rather broadly rounded; hind margin feebly bi- 
sinuate; surface closely finely punctate, finely pubescent, 
sparsely covered with short pale setae. Prosternal process 
relatively more narrow between the coxae than in the other 
