H. M. PAUSULKY 
4 '.) 
rc'kitod to any other. It may he j^laced Ikmx', luair the end of the 
ornalm si’oup, as transitional in antennal f^trncture. \’an Dnzee'^ 
notes eei’tain differences in coloration and in antennal and ])ro- 
notal structure exhibited l)y the two spc'ciniens ori<2;inally d('- 
scribed, and treats them as sexual chai'act(‘ristics, but study of 
a Ions sei'ies received from Dr. II. H. Knifrht indicates that these 
differences are not sexual but due rather to individual variation, 
which, in this sp(‘cie.s, is unusually great. During the past sum- 
mer \’an Duzee has found depidus again at San Leandro, near 
Oakland, California, and he sends me the following notes on its 
habits: “As found here this si)ecies seems to occur only under 
the loose bark of live oak stumps and logs and the dry sumnu'r 
season seems to be both the time of aestivation and of develop- 
ment from larval to adult condition. All found were hiding 
in depressions or crevic(“s of the luirk. A])par(‘ntly they mature 
and then lie almost dormant until the fall rains.” 
18. Aradus (Aradus) concinnus Bergrotli (Plate II, fig. IS.) 
1892. Aniflus coticinnus Bergrotli, Proe. Eat. Soc. Wa.shiiigton, ii, p. ',VA7. 
1900. Arailus concintnia Bergrotli, Can. Eat., xxxviii, p. 198 iPdfitosonirt). 
DiHlrihiidon. — C.\lifokxi.\: Lo.s Angeles County (P). \\'. Coipiillett) ; 
Palm Sjirings, 11, 10, 1897 (II. C. Ilublianb; ‘‘Southern California” (Morri- 
son). 
Description. — Brown, variegated with jiale, reddish, and dark brown mark- 
ings; spines and tubercles of head, first antennal segment, submedian and 
apical rings of second, and apical three-fourths of third, yellowish, fourth dark 
brown; expanded margins of pronotum with a large, ovate, yellowish trans- 
lucent spot anteriorly; scutellum brown, the disc reddish yellow toward apex, 
the margins yellow at middle then narrowly black to apex; corium yellowish 
white, dark brown at apex and variably so along jjrincipal veins and between 
some of the transverse veins; membrane white, with iiKjre or less extensive 
brown maculation; cemnexivum reddish, each segment with a dark sj)ot at 
inner basal angle and a narrow dark line along lateral margin which does 
not cpiite reach ai)ex; inner margin of genital lobes pale; legs yellowish, 
femora biannulate with brown, tibiae annulate before apex; ventral surface 
of thorax dark brown, of abdomen })ale with dark mottling. 
Head slightly longer than broad (2.5 to 24j, longer than pronotum (2.5 to 
20); tylus of moderate length, strongly com])ressed; impressions of vertex 
fleep, divergent anteriorly, whole vertex sunken; preocular tubercles very 
large, acute; jjostocular moderately developefl; an extra tubercle between 
Proc. Cal. Acad. Sci., (4), vii, p. 2.54, 1917. 
TK\XS. .V.M. EXT. SOC., .XLVII. 
