Pomona College, Claremont, California 11 
8. Macrotylus tristis Uhler 
This is a dull slaty-black insect about the size of the preceding, 
becoming polished beneath and on the unusually prominent clypeus. 
There are two minute pale spots on the vertex and there may be 
two more on the callosities and two on the basal and two on the 
apical lobe of the scutellum; the membranal nervures, basal margin 
of the cuneus and commissural nervure beyond the apex of the clavus 
calloused and white. Wing cell without a hamus. Basal joint of 
the antenne scarcely surpassing the clypeus, the antennal incisures 
and knees white. The whole upper surface is rather sparingly 
clothed with pale pubescence. 
I took numbers of this sombre looking species on the hills about 
Lakeside and Mussey’s, San Diego County, California, during April 
and May, 1913. 
9. Macrotylus regalis Uhler 
I took three males of what I am identifying with some doubt as 
Uhler’s regalis from Adenostoma at Alpine, San Diego County, 
California, in June, 1913. These are smaller than Uhler’s unique 
female, measuring but three and one-half millimeters to the tip of 
the membrane; the anterior lobe of the pronotum is red like the 
posterior, the vertex and front have a median red vitta; the pectoral 
surface and abdomen are red instead of black and the membrane is 
infuscated with the nervures pale. Most of these differences repre- 
sent merely an extension of the red color which may be characteristic 
of the male sex. 
In this species the head is almost horizontal with the apex more 
produced than in any of our other species and the basal joint of the 
antenne is shorter, not attaining the apex of the clypeus. The upper 
surface is of an almost uniform dark sanguinous, sparsely clothed 
with fine pale pubescence and showing some dark markings about 
the callosities and along the median line of the pronotum and scutel- 
lum. It is peculiar in having the apical antennal joint conspicuously 
flattened, much more distinctly so than in our other species of the 
genus. 
