214 THE UNIVERSITY SCIENCE BULLETIN. 
the length of the tibia, the latter equal to the claws, and 1% the length 
of the tarsus. Length 514 to 6 mm.; width across pronotum 14% mm. 
“Types 2 (male) and 2 (female), from White Plains, N. Y., collected 
in August and September by J. R. dela T. Bueno. Other specimens have 
been examined from Washington, D. C. (coll. W. L. McAtee) Oglethorpe, 
Ga. (coll. T. C. Bradley) Hadley, Mass., (coll. C. A. Frost) and Valhalla, 
N. Y. (coll. Bueno). . The species, therefore, appears to be distributed 
pretty widely up and down the Atlantic coast of the United States. 
“Variation. Some twenty specimens have been examined in addition 
to the described types. These individuals show a wide range of varia- 
tion, such that the extremes would seem to belong to different species were 
it not for the intergradation. The writer has been unable to find any 
constant character, however, which would serve as a basis for disecrimina- 
tion. The smallest (White Plains) measures but 444 mm., the largest 
(same locality) 6% mm. The tegminal surface may be smooth and 
polished, or dull and rastrate, the lineations varying from the regular 
complete lines of the type to interrupted and confused markings, re- 
sembling those of P. gillettei; the inner angle of the clavus, however, is 
never bare of lineations. Pronotal lines 6-9, either entire or much broken 
and confused. The index of pronotal width divided by pronotal length 
ranges from 2.22 to 2.60 in the o , and 1.79 to 2.73 in the ¢ ; that of the 
head width divided by the interorbital width ranges from 2.87 to 3.57 in 
the Q and from 3.60 to 4.20 in the 4 ; that of the head width divided 
by the head length from 2.07 to 2.60 in the Q and from 1.68 to 2.33 in 
the g. In the male the palar pegs are sometimes crowded into two 
rows at both ends of the series. The absence of functional wings in both 
sexes in this genus certainly interferes with the rapid dispersal or mix- 
ing of individuals from adjacent localities, and thus brings about a 
partial segregation which would preserve and intensify aberrant varia- 
tions. This possibly explains the very unusual range of variability above 
described.” 
Palmacorixa gillettti Abbott. 
Ento. News, Vol. XXIII, p. 337, Oct. 1912. 
“Head pale yellow, vertex usually carinate, posterior angles rather 
acute and produced backward. Posterior margin emarginate. Inter- 
orbital space (posterior margin) about twice in the median length of the 
head in the male; one and a half times in the female. Inner margins 
of eyes parallel in facial aspect. 
“Pronotum lenticular, with a more or less definite median keel, rather 
strongly margined, the margin being marked by a narrow line of brown, 
the anterior line incised to correspond with the emargination of the head. 
Color, yellowish, paler at the sides, with eight to ten delicate broken and 
confluent lineations, some of the most posterior of which join the mar-_ 
ginal line. Surface of pronotum polished, minutely rastrate; it requires 
a compound microscope to resolve the rastrations. 
“Tegmina polished, nonrastrate, light yellowish with brown mark- 
ings. The latter are quite variable, usually not displaying the familiar 
cross-barred effect of the majority of the species in the family. Clavus 
more or less immaculate toward the inner angle as in mercenaria Say, the © 
markings reduced to a more or less definite diagonal stripe following the 
direction of the corial suture. The inner edge of the clavus is margined 
with brown, and between this and the diagonal stripe mentioned are nu- 
merous lineations, ranging from isolated flecks in some individuals to 
interlocking and cross bars in others. Embolium immaculate, its inner 
edge strongly margined. Corium and membrane with vermiculate and 
inosculate brown markings, usually arranged in two rather indefinite 
longitudinal stripes. A dark fleck on the outer edge of the membrane. 
“Metathoracic wings aborted in both sexes to a rudiment which ex- 
—— a a oe! 
