170 THE UNIVERSITY SCIENCE BULLETIN. 
merging into the black membrane, which shades off into smoky and then 
white at the apex. One of the types is the most pronouncedly melanic 
specimen of the species in a series of 60 or so specimens. In this the 
extreme of scutellar darkness with orange-red edges obtains. The ex- 
ternal edges of the clavus are broadly black, shading into smoky to the 
corial suture; the dark band on the corium parallel to this suture is 
broad; the humerus has a black streak running into the corium, which 
is dark luteous, except for the black fascia which coalesce with the 
black membrane, which in turn lightens to smoky at the apex. The 
structural characters are the same as in the others. 
“Measurements. Vertex, 1 mm.; synthlipsis, 0.15 mm.; pronotum, 
long., 1.5 mm to 1.8 mm.; pronotum, lat. (at humeral angle), 2.5 mm. to 
2.9 mm. (at base 2 mm.); scutellum, long., 1.6 mm.; scutellum, lat., 2 
mm.; insect., long., 8 mm. to 8.8 mm.; insect, lat. (at humeral angle of 
pronotum), 2.5 to 2.9 mm. 
“Described from sixteen specimens from Raleigh, N. C. Types: Col- 
lections U. S. National Museum, American Museum of Natural History, 
C. S. Brimley, and mine. Z 
“This species very much resembles a dwarf variabilis, but it is easily 
distinguishable by the cephalic structure.”’—Bueno. 
Distribution: Bueno gives it as locally abundant at Raleigh, N. C. 
He records it also from New Jersey, Illinois, Maryland and Washing- 
tons DEG: 
Notonecta uhleri Kirk. 1897. 
. Kirkaldy, Ann. Mag. Nat. Hist., (6), XX, p. 58. 
“Head: Notocephalon in the form of an inverted wine decanter, mar- 
gins greatly curved, widely diverging toward the vertex, which is six 
to eight times wider than the synthlipsis, at which point the eyes are 
almost contiguous; breadth of the eye about ten times as great as that © 
of the synthlipsis. Pronotum: humeral angles acute, accentuated lateral — 
margins sinuate, humeral margins little separate from the posterior mar- 
gin. Metanotum dark purple-brown. Hemelytra varying from dark 
brick-red to rich orange-yellow; a large irregular black blotch at the base — 
of the corium extending transversely and nonacuminately from the apex 
of the clavus to the golden-yellow exocorial lateral submargin; membrane ~ 
dark red-brown, apically black—this tint encroaching more or less basally. 
Alar nervures brown. Pedes: Coxe blackish; intermediate tibial spur — 
blunt, subeylindrical. Abdominis dorsum: first and second segments — 
rufotestaceous, deeper marginally, the remainder flavotestaceous, lurid | 
marginally; this latter tint encroaching more and more apically. Ab- 
dominis venter rufotestaceous, densely provided with greenish-black cilia.” 
—Bueno and Kirkaldy. 
Distribution: New York, Massachusetts, Florida, New Jersey, Louisi- — 
ana, and District of Columbia. 
This is a rare bug according to Bueno and the writer feels proud to — 
have one specimen in his own collection—the gift of Mr. Bueno. 
Notonecta mexicana Amyot and Serville 1843. 
Amyot et Serville, Hist. Nat. Ins. Hem., p. 453, pl. 8, fig. 7. 
“Head narrow at base, parallel for a short space, then sinuately di-— 
verging; vertex from three and one-half to four and a half times as wide | 
as synthlipsis. Pronotum very transverse, about two and one-half times | 
wider than long, lateral margins slightly sinuate, humeral margins 
gently and elongately curved, posterior margin not sinuate; humeral 
angles. acute, accentuated. Metanotum not quite half as long again as 
scutellum, black (dark vars.) or violet brown margined luteous (pale 
vars.) Hemelytra varying in color, membrane lobes subequal. Ale 
