“ 
HUNGERFORD: AQUATIC HEMIPTERA. 173 
Notonecta insulata Kirby 1837. 
W. Kirby in Richardson’s Fauna Boreali Americana Insects (Reprint in Can. Ent. 1878). 
“Head; notocephalic lateral margins fairly straight and nearly par- 
allel, very slightly constricted near the base; vertex little wider than 
synthlipsis, which is about one-fourth less than the width of the base of 
the eye. Lateral and humeral margins of the pronotum sinuate. Scutel- 
lum varying slightly in length. but occasionally reaching and usually 
nearly reaching the base of the metanotum, black (Fieber in N. rugosa 
records two varieties (coridgera and basalis) with yellowish scutellum, 
but I have not seen them). Hemelytra variable in pattern and_ color 
; Ale, basal nervures crimson, the others yellow-brown. Pedes: 
coxee black, intermediate tibial spur small, slender, not tipped with black. 
Abdominis dorsum: segments 1 black, 2 £6 brilliant scarlet, 7-8 reddish- 
testaceous. Abdominis venter black, connexivum and central carina 
green. 
“Long., 12.6 to 15.5 mm.; lat., 4.8 to 5.6 mm.”—-Bueno and Kirkaldy. 
Localities: Nebraska, Colorado, Arizona, New Mexico, New Jersey, 
Nevada, Connecticut, Indiana, Utah, Maine, Oregon, California, Quebec, 
Ontario, Massachusetts, New York, Montana, Dakota, Idaho, Vancouver 
Island, New Hampshire and Rhode Island. 
Genus BUENOAKirkaldy. 
Named in honor of Mr. J. T. de la Torre Bueno. 
Similar to the genus Anisops, but the male is provided with two tarsal 
segments on the front legs, and the claws are differently formed. 
Head: Eyes not contiguous, but interior margins about parallel, their 
margins curving slightly, making distance at vertex greatest, and inter- 
ocular space long and narrow. Labrum reaching to apex of second 
rostral segment; last segment of antenna longer than the penultimate. 
Thorax: Pronotum not most transverse; ale present and the hemely- 
tra divided into clavus, corium and membrane, and more transparent and 
hyaline than in Notonecta. Hind femora not reaching apex of hemely- 
tra. The hind tarsi are provided with more conspicuous claws than 
Notonecta. The middle and front legs are armed with long spines and 
the males of Buenoa elegans and Buenoa margaritucea at least are 
equipped on the front leg with a tibial structure borne on the inner face 
of a prominence, which is forced into a thin elongate spur by the eleva- 
tion of the inner angle or margin of the tibia near its base. Tarsi of 
front legs 2-segmented in both sexes. 
Abdomen: The abdomen is provided with a median ventral carina and 
the lateral margins of the venter are provided with guard hairs which 
cover the “gutters.” The female has the last ventral abdominal seg- 
ments modified for sheathing the ovipositor, which consists in the main 
of a pair of somewhat spatulate chitinized gonapophyses for placing the 
eggs in the tissues of plants. 
KEY TO THE SPECIES OF GENUS BUENOA. 
A. Species over 6 mm. long. 
B. Pronotum in the male with four depressions, appearing tri- 
carinate in this sex. 
