58 Mr. G. W. Kirkaldy on Aquatic Rhynchota. 
the neglected aquatic Rhynchota. 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 
marginibus lateralibus interioribus fere parallelis; pronoto fere 
duplo latiore quam longiore. 
Long and narrow ; verter 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 ; pronotum not quite twice as 
wide as long, punctate posteriorly, rugulose anteriorly ; eyes 
brown. Scutellum black. Metanctum and dorsal aspect of 
abdomen shining black ; genital segments blackish fuscous, 
margined with green. L/emielytra 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. 
Pedes apparently destitute of bristles, dark testaceous. 
Venter black. 
Connexivum 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 millim. ; 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 ‘ dact7- 
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 . insu- 
lata, W. Kirby. 
7. Notonecta Uhlert, sp. n. 
Gracilis, angusta; capite parvo; oculis magnis, prominentibus, 
fere contiguis basin versus, marginibus lateralibus interioribus 
curvatis, late divergentibus verticem versus, capitis vertice 6-S8plo 
latiore quam basi. 
Somewhat of the size and form of N. americana, Fabr., 
