28 



This species is so very similar in general appearance to the last 

 that I might probably have overlooked it had not Dr. Hagen assured 

 me that I had sent it to him long ago. I have found three or four 

 examples among some old duplicates, but only one of these bears any 

 indication of locality ; that one is from Haslemere. In the male the 

 lobe from the last segment is apparently more pointed than in flavoma- 

 culatus (but I have only noticed dry specimens), and the app. intermed. 

 more claw-shaped and curved. The app. sup. present the most certain 

 characters ; they are long and pointed, vrith the apices incurved rather 

 suddenly ; the app. inf. are larger, but othervrise similar in form. 



The synonymy of this species is a little doubtful. Unfortunately, 

 at the time when Curtis' collection was sent away, I was not sufficiently 

 acquainted with these insects. I noted that his P. midtiguttatus and 

 trimaculaUis were identical, but may have been mistaken. The citation 

 of Kolenati's species is given from a comparison made by Dr. Hagen, 

 with a typical specimen in his collection. 



Polycentropus suhnehulosus — Stephens' Catalogue. 

 Polycentropus subnehulosus, Stepb. Cat. p. 317, 3,598 (1829) ; 

 P. multiguttatus, Steph. 111. p. 178, 8, partim (1836), not of 

 Curtis; P. fyrrlioceras. Hag. Ent. Ann. 1861, p. 4, 90, not of 

 Stephens. 

 Either a much overlooked or very local species. Mr. Barrett has 

 found it abundantly near Haslemere, and I have also a single specimen 

 from the Norfolk fens. The usual golden or yellow spots are very in- 

 distinct in this species, and only visible in specimens in good condition. 

 It may at once be recognized by the form of the app. intermed. in 

 the male. These are formed of two narrow tongue-like pieces placed 

 closely together and bent under like a haustellura ; between them is a 

 long narrow lobe. 



As a rule, I consider that mere catalogue names have no claim to 

 the right of priority. I have adopted the name here given to avoid 

 giving a new one. The types in Stephen's collection are two, one of 

 which is this species with his small catalogue label ^^ subnehulosus,^'' the 

 other is a female of F.Jlavomacitlatus. 



Polycentropns picicornis — Stephens. 

 Polycentropus picicornis, Steph. 111. p. 177, 2 (1836) ; P. pulcheUus, 



Hag. Ent. Ann. 1861, p. 5, 92. 

 A common species frequenting canals, and other still waters ; very 

 active and frequently running on the surface. It may be recognized by 

 the first apical sector, or anterior brancb of the ramus discoidalis in the 



