hungerford: aquatic hemiptera. 173 



Notonecta insulata Kirby 1837. 

 W. Kirby in Richardson's Fauna Boreali Americana Insects (Reprint in Can. Ent. 1878). 



"Head; notocephalic latei'al 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 .V. rugosa 

 records two varieties {coridgera and basalis) with yellowish scutellum, 

 but I have not seen them) . Hemelytra variable in pattern and color 

 . Alae, basal nervures crimson, the others yellow-brown. Pedes: 

 00X86 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 BUENO^Kirkaldy. 



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; alae 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 Biienoa, margaritacea 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. 



