LeConte. ] 604 [April 18, 
4. Margin of thorax entire : 
Form rather broad, thorax densely and freely punctured.......... 
pluriguttatus. 
Form slender, thorax coarsely and deeply punctured Melsheimeri. 
Margin of thorax serrulate : 
Elytra maculate with yellow spots............. ...-pluripunctatus. 
Elyitra pICeOUs LO wiles ce tell) -ie POS OOSDOCOAI ES Badoooa ToGo ooh 
5. Elytra nearly black. Male with brush of hair on first ventral......... 
tenuifasciatus, n. sp. 
Elytra piceous, maculate with yellow. Male without brush........... 
obsoletus, n. sp. 
6. Elytra maculate with large yellow spots............... confusus, n. sp. 
With Melsheimeri I have united obscurus, the latter seeming to be 
merely an unicolorous form. M. pint and pluripunectatus would seem to 
occupy the above relationship, but the latter is always more slender and 
less depressed. 
Of the above species californicus and pluriguttatus are peculiar to Cali- 
fornia, confusus to Colorado, tenuifasciatus extends across the north of our 
territory, while the other species are widely distributed in the Atlantic and 
Gulf States. 
29. Mycetophagus califormnicus Horn, u.sp. Oval, piceous, fee- 
bly shining, sparsely clothed with brownish pubescence. Head moderately 
densely punctate. Antenne brownish, base and terminal joint paler, the 
latter neariy as long as the two preceding. Thorax transverse, broadest 
at base, sides arcuate and gradually narrower to apex, margin not serrulate, 
surface moderately densely punctured with coarse and fine punctures, basal 
impressions moderately deep. Elytra nearly black, with a yellow oblique 
spot at the humeri, and a transverse fascia at apical third, not attaining the 
suture nor margin, surface with strive of small sub-quadrate punctures not 
closely placed, intervals flat, irregularly biseriately punctulate. Body be- 
neath and legs brownish, prosternum nearly smooth, abdomen finely but 
not densely punctulate. Length .16 inch; 4 mm. 
This species is of the same general form as punctatus but smaller. The 
elytral markings in the two species are of the same type but in the pres- 
ent the yellow color is less extended. The antennie are not longer than 
the head and thorax. The abdomen of the male is simple, the first joint of 
the anterior tarsi slender and moderately long. 
Two specimens, Lake Tahoe, California, Crotch. 
30. Mycetophagus tenuifasciatus Horn, n. sp. Oval, piceous 
black, feebly shining, sparsely pubescent. Head moderately densely punc- 
tate. Antennee piceous, last three joints broader. Thorax transverse, sides 
arcuate, margin not denticulate, base very slightly narrowed, disc densely 
punctured with coarse and fine punctures intermixed, those toward the sides 
coarse, basalimpressions feeble. Elytra with strize of moderate punctures 
rather closely placed, intervals finely biseriately punctulate. Abdomen 
