156 
Psyche 
[June 
Lapethus discretus Casey 
(Fig. 28) 
Lapethus discretus Casey, 1890: 318. Type locality: Near Humboldt Bay, 
Humboldt Co., California. Holotype, No. 48835 U.S.N.M. 
This species is characterized by the oval, somewhat flattened form, 
reddish color, distinctly seriate elytral punctation, fine, erect hairs 
easily visible under 10 X magnification, distinct lateral pronotal mar- 
gins, 8-segmented antennae with a 1 -segmented club, and large antero- 
lateral antennal cavities on the underside of the pronotum. The pro- 
coxal cavities are fairly narrowly separated and distinctly open behind, 
while the prost'ernal process is parallel-sided and strongly rounded at 
apex. Philothermus glabriculus is superficially similar but more 
elongate and parallel sided, with different antennae and no antennal 
cavities. The species may be distinguished from the related L. striatus 
by the larger size (2.0-2. 3 mm.), coarser and denser pronotal punc- 
tation, shorter labrum, and fully developed eyes and wings. 
Distribution. Pacific Coast, from western Washington (King 
County) to central coastal California (Santa Cruz County) and 
the Sierra Nevada (Tuolumne and El Dorado Counties). 
Biology. Collected in the Sierra Nevada by sifting rotten conifer 
logs in the red rot stage. 
Lapethus striatus (Sen Gupta and Crowson), New Combination 
Lapecautomus striatus Sen Gupta and Crowson, 1973: 412, fig. 178. Type 
locality: Below Ramsay Cascades, 3500', Great Smoky Mts. National 
Park, Sevier Co., Tennessee. Holotype, Field Museum. 
This species is smaller than L. discretus (1.5- 1.7 mm.), with the 
pronotum more finely and sparsely punctate, the eyes reduced to 
about 10 facets, and the wings completely absent. The labrum is 
also longer and narrower at the apex, and the mouthparts are more 
highly modified for piercing. 
Distribution. Known only from the cove forests of the Great 
Smoky Mountains, Tennessee, and the nearby Joyce Kilmer Forest, 
North Carolina. 
Biology. Adults have been collected in samples of leaf litter under 
Rhododendron and in mixed hardwood and Tsuga forest. 
