AMEHIC’AX SPECIES OF AKADUS (iIEMIPTERA) 
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9, (liinorphic s'ki). Posterior margin of dorsal genital segment 
einarfiiiiate at middle, slightly obliciue at sides. Lensth, 3.8 to 5 mm. 
Maeropterous form (fis- 50(1.2). Pronotum moderately convex; hemiely- 
tra broad, eoveriiif>: most of disc of abdomen, extending over base of dorsal 
genital segment, eorium to ai)ex of fourth. 
Praehyi)terous form (fig. 50(1.1). Pronotum reduced in size, flat; hemi- 
elytra slightly longer than seutellum, costal margin broadly rounded; mem- 
brane absent or slightly developed. 
'Fyiip s])(U‘iiucns not located. 
'riiis siiecies, of liolarctic rang;e, is readily recognized by its 
small size, reddish color, short and thick antennae, etc. It is 
certainly a memlter of the sul.igenus Aradus, but in type of wing 
])olyniorphisni it exhibits a striking similarity to heidenianni, of 
the subgenus Quilnus, an example of the interrelations which 
obtain throughout the genus. The narrow hemielytra of the 
male are in reality an indication of bracliyptery in the broad 
sense, i. c., wing reduction, for the iironotum is characteristically 
flattened and the hind wings are absent. After comparison with 
numerous Euro]X'an examples, 1 find nothing distinctive in the 
American material, except iiossibly a somewhat smaller average 
siz(', and can thus conhrm Stabs remark, “Siiecimen unicum 
lexanum a s])eciminibus europaeis distinguere nequeo.” Cin)i(i- 
moniciiH is usually taken in beating iiine branches, rather than 
by searching under sheets of dead bark, and in fact its habits are 
(piite ditferent from those of other species. It is to lie hoped that 
■Mr. Win. d\ Davis or some other well (pialihed American ob- 
serviM- will give this matter his attention, since but little has 
Ikm'u doiu' on it in this country. Kiritshenko-^ writes as follows: 
“In the district of St. Petersburg, according to L. Wk Pianki, 
Ar(i(hi.s ciiuunnotNCKti occurs in great (piantities mostly but not 
(‘xclusively on isolated healthy pines of medium size (about 
to o inches in diameter), under ))ieces of bark which are almost 
('ntir(‘ly IoosimumI, have' about .3 to 1.0 mm. thickness, and abutt 
with inmu' surtaci' against sap-containing parts of the bark, 
'bhi'se sap-containing pai'ts usually havi' a (luite light brown 
color (‘ashy r('cognizabl(‘ from Ihe lutous or rufous-brown coloi’ 
ol the ou((‘r bark. ... In llu‘ disti’ict of Lonija the dam- 
ag(“ doiH' by d. ci h /K uiioinciis is appi'('ciable, consisting in tlu' 
I’iimu' Pii.ss.'c, llcmipt., vi, p. Si), (111 1 3). 
