58 Mr. G. W. Kirkakly on Aquatic Uhynchota. 



the neglected aquatic Uhynchota. I am also indebted to 

 Dr. Bergroth for kindly lending me the type of N. chinensis. 



6. Notonecta lactitans, sp. n. 



Gracilis, capitis vertice quam basi circiter quarto latiore, oculorum 

 marp^inibus lateralibus iiiterioribus fere parallelis ; pronoto fere 

 duplo latiore quam longiore. 



Long and narrow ; vertex about a fourth wider than the 

 base of the head, interior lateral margins of the eyes almost 

 parallel ; head longitudinally subcarinate at the base ; head 

 and prothorax sordid testaceous ; jironotum not quite twice as 

 wide as long, punctate posteriorly, rugulose anteriorly ; eyes 

 brown. Scutellum black. Metanotum and dorsal aspect of 

 abdomen shining black ; genital segments blackish fuscous, 

 margined with green. Hemiehjtra present a zebra-like ap- 

 pearance ; clavus yellowish brown ; corium yellowish brown, 

 with a broad dark brown band along the base ; membrane 

 basally dark brown, apically yellowish brown ; the exterior 

 margin of the hemielytra is very narrowly pale. 



Fedes apparently destitute of bristles, dark testaceous. 

 Venter black. 



Coniiexivum greenish. 



In the specimen from Gaboon the left interior lobe is trans- 

 lucent, sordid white, and the scutellar and sutural margin of 

 the clavus narrowly blackish brown. 



Long. 12-12'5 millini. ; lat. pronot. 4-3"4 millim. 



Guinea : my collection. Gaboon : coll. Signoret, Hof- 

 museum in Wien). Africa {Burchell) : British Museum. 



The specimens in the British Museum are labelled " lacti- 

 tans, Burchell." I have searched through the whole of the 

 two vols, of Burchell's ' Travels ' and through his other works, 

 and can find no trace of any such name ; I have therefore 

 treated it as MS., but have used the name to prevent possible 

 future confusion. 



This species has no very close affinities with any other 

 Notonecta ; its long and slender form will at once distinguish 

 it, aided by its curious zebra-colour ; the structure of the head 

 will place it in the neighbourhood of the American N. insu- 

 latttj W. Kirby. 



7. Notonecta Uhleri^ sp. n. 



Gracilis, angusta ; capite parvo ; oculis magnis, prominentibus, 

 fere contiguis basin versus, marginibus lateralibus interioribus 

 curvatis, late divergentibus verticem versus, capitis vertice 6-8plo 

 latiore quam basi. 



Somewhat of the size and form of N. americana, Fabr., 



