Dec. I902.J BUENO : NOTONECTID.*: OF ViCINITV OK NeW YoRK. 235 



Notonecta irrorata Uhl. 



" Head ■i.vci'aW, notocephalic lateral margins diverging widely, vertex a little more 

 than three times as wide as synthlipsis; width of vertex and of the eye subequal ; eyes 

 rather larger proportionately than some other species ; pronotum much wider basally 

 than apically, lateral margins not sinuate, humeral angles acute, humeral and posterior 

 margins sinuate. Ilonely/ra rich black, irrorated (especially on the clavus) with 

 refulgent yellow-brown, interior lobe of membrane and apex of exterior lobe smoky. 

 The irrorations vary greatly in diflerent individuals ; in some the corium and mem- 

 brane are almost immaculate, in others the whole of the clavus and corium is irrorated, 

 imparting a checkered appearance, while in others the clavus is rich (almost metallic) 

 yellow-brown with faint distant, narrow black lines. Alai- nervures brown. Pedes : 

 intermediate tibial spur small. Abdominis dorsum : first lo fifth segments black ; 

 sixth, seventh and eighth sordid grayish brown. Abdomitiis venter black. Long. 

 13-14 mm.; lat. 4-4.5 mm." 



This species has been found in the Park lakes by Mr. E. B. South- 

 wick ; Mr. Barber has found it in company with the insiilata before 

 mentioned ; and Mr. Davis and myself on Staten Island. We found 

 it in a pond shaded by trees and surrounded by vegetation, matted 

 with decaying roots ; fallen leaves and limbs, and aquatic plants were 

 mixed in the black water. It was fairly abundant there. 



This cannot be confused with any of the other local species. Its 

 dark color, small head and chunky shape will at once serve to distin- 

 guish it. 



Notonecta uhleri Kirk. 



" Head : notocephalon in the form of an inverted wine decanter, margins 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. Pronotum : humeral angles 

 acute, accentuated, lateral margins sinuate, humeral margins little separated from the 

 posterior margin. Metanotiim dark purple-brown. Henielytra varying from dark 

 brick-red to rich orange yellow ; a large, irregular blotch at the base of the corium 

 extending transversely and non-acuminately 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. /^ A?;- nervures brown. Pedes : coxte blackish ; 

 intermediate tibial spur blunt, subcylindrical. Abdominis dorsum : first and second 

 segments rufo-testaceous, deeper marginally, the remainder flavo-testaceous, lurid 

 marginally ; this latter tint encroaching inwards more and more apically. Abdominis 

 t^f«/^r rufo-testaceous, densely provided with greenish-black cilia;. Long. $ II-II.4 

 mm., 9 12 mm.; lat. $ 3.5-4 mm., 9 4 mm." 



This I have no knowledge or record of in this vicinity, but as it 

 occurs in Massachusetts and also in Florida, it may perhaps be found 

 here. 



