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Psyche 
[December 
Etymology. The name notoperates derives from the Greek: notos, 
masc., south, and perates , masc., wanderer, alluding to the remark- 
able extension by this species of the range of Boreus to the south. 
Relationships 
Males of Boreus notoperates will classify as B. isolatus Carpenter 
when Carpenter’s keys (1935, 1936) for North American Boreus 
are used. However, they strikingly differ from that species by their 
considerably longer rostrum (ca 2.1 X eye-length; “scarcely longer 
than the eye” in B. isolatus). Females of the new species will be 
excluded at couplet 7 (revised key, Carpenter 1936) because the 
ovipositor of B. notoperates is but two-thirds the length of the ros- 
trum. 
The only known North American form with which B. notoper- 
ates might be confused is the closely related B. brevicaudus Byers 
(1961). These two are markedly alike by having a reduced number 
of antennal segments (most Boreus have 21 or more), condyles of 
antennae opposite lower margins of eyes, no median ocellus, a long 
hypostomal bridge, no epandrial “hood”, and the 10th tergum of 
the female is abruptly narrowed on each side to form a pair of 
spined terminal blades. However they are readily distinguished in 
both sexes, for B. notoperates has 19-segmented antennae (18 in B. 
brevicaudus ), the frons more conspicuously foveate, a more heavily 
and richly spined area to each side of the epandrial notch, a very 
much shorter, inconspicuous submedian tooth of the dististyle, an 
emarginate hypandrium (entire in B. brevicaudus ), a relatively 
longer forewing in the female (L/W = 1,7 X ; 1.3 X in 5 . 
brevicaudus ) which lacks subapical spines, a relatively longer ovi- 
positer (0.67 X rostrum versus 0.5 X ) with more coarsely and 
extensively spined gonapophyses and apical blades, and the apical 
blades are divergent. Though color differences are often of little 
weight, the males of these two species have the color patterns of 
their genital segments and dististyles reversed ; what is dark in the 
one is light in the other, possibly continuing a distinction important 
at a time that their progenitors were sympatric. 
At least four of the twelve recognized Eurasiatic forms share with 
B. notoperates (and B. brevicaudus ) the following set of characters: 
a reduced number of antennal segments (21 or less), a relatively 
short ovipositer, a male having the forewing narrow at base and no 
(or nearly no) apophyses on abdominal terga 2 and 3, namely B. 
chadzhi-gireji Pliginsky (1915) and B. vlasovi Martynova (1954), 
