224 CALIFORNIA ACADEMY OF SCIENCES. 



25. Orus femoratus, sp. nov. 



Male : Fifth ventral with a short, broadly rounded median lobe longi- 

 tudinally impressed, the impression longitudinally divided at base by a 

 short median raised line, and becoming posteriorly a spoon-shaped depres- 

 sion which is limited at the sides by acutely elevated folds or ridges; sixth 

 ventral with a deep oblong-elliptical emargiuation which is widest at the 

 middle of its depth and obtusely rounded in front, the base of the segment 

 in front of the emargination with a smooth triangular impression having 

 abrupt side margins. Hind femora much stouter than usual, and fully as 

 broad as the anterior; lower edge acutely, sinuately compresso-carinate in 

 basal half. 



Represented by a single male collected by the author 

 in Marin County. 



In all the above species antennal joints two-four are 

 distinctly, progressively shorter and not subequal, as is 

 described of 0. parallelus. 



26. Leptorus calif ornicus, sp. nov. 



Slender, parallel, head and thorax rufotestaceous; elytra, metasternum, 

 and abdomen, fuscous, the former with the suture narrowly, indefinitely 

 paler, antennae and legs pale; surface subalutaceous and dull except the 

 thorax, which is feebly shining. Antennae proportioned as usual. Head, 

 as limited anteriorly by a line tangent to the anterior margin of the eyes, 

 nearly square; sides behind the eyes parallel, twice the length of the eyes, 

 hind angles narrowly rounded; base truncate, without median sinuation; 

 surface densely, very finely punctate. Thorax narrower than the head, a 

 little longer than wide, sides parallel, front angles strongly obtuse and 

 rounded, base elliptfcally rounded; surface excessively finely, and more 

 sparsely punctate than the head. Elytra about one-fourth longer than 

 wide, distinctly wider and slightly longer than the thorax; punctuation 

 fine and dense, but distinctly coarser than on the head. Abdomen a little 

 narrower at base, surface very densely, finely punctate; sixth ventral in 

 the male rather deeply, triangularly emarginate, the emargination as wide 

 as deep and scarcely rounded at the bottom. 



Length, 1.9-2.4 mm. 



Described from two males taken at Palm Springs, on 

 the western border of the Colorado Desert. 



In general facies much like L. texanus Casey, but 

 easily distinguishable by the male abdominal characters. 



