148 [July. 



A TABLE OF THE BRITISH SPECIES OF THE COLEOPTEROUS 

 GENUS GTROPHMNA, Mann. 



BY NORMAN H. JOY, M.R.C.S., F.E.S. 



In the following table of the British species of Gyropheena, 

 Mann., it will be noticed that there are two additions to the list, one 

 of which is new to science. G. hihamata, Th., is probably mixed with 

 G. Isevipennis, Kr., in most collections, as the females are very much 

 alike, but the males are easily distinguished by the shape of the 6th 

 (free) segment of the hind body ; I have seen specimens from Berks, 

 Hants, near Cardiff (Tomlin), and Westmorland (Day, who noticed 

 the peculiar (^ characters some time ago). G. convexicoUis, sp. n., is 

 probably rare, as it occurs, like its nearest ally, G. lucidula, Er., in 

 marshy places.* I have taken three males from flood- rubbish at 

 Tlieale and Thatcham, Berks., and it has occurred to Commander 

 Walker at Yarnton, near Oxford, in April, 1907, among wet dead 

 sticks in a swamp. 



In the accompanying illustrations of the last two dorsal segments 



of the hind body of the males, the under-plate of the last segment is 



not shown. In the table the " 6th segment " refers to the 6th free 



segment, which is the last. 



Table. 



I. — Penultimate joints of antennce not transverse, 5th joint longer than broad. 



i. Elytra extremely finely punctui-ed. Length, 2'4 — 2'8mm.... 



pulchella, Heer. 



ii. Elytra alutaceous and with diffuse rather lai'ge shallow punctures. 

 Length, I'o — 2 mm affinis, Mann. 



II. — Penultimate joints of antennae distinctly transverse, 5th joint transvei-se. 

 i. Head slightly transverse ; temples more than half the diameter of the 

 eyes, which are smaller and less prominent. 



1. — Thorax and elytra very scantily pubescent ; thorax pitchy black. 



...strictula, Er. 



2. — Thorax and elytra i-ather closely, finely but distinctly, pubes- 

 cent; thorax reddish yellow Isevicollis. Kr. 



ii. Head sti'ongly transverse, temples very short, hardly one quarter the 

 diameter of the eyes, which are larger and more prominent. 



1. — Thorax entirely and diffusely punctured with large punctures, 

 which are not arranged in two rows on disc. 



A. — Colour pitchy black, elytra slightly lighter... manca, Er. 



B. — Colour yellow, head, postero-external angles of elytra, 

 and 4th segment of hind body, pitchy. 



* I have recently taken fifty .specimens of G. lucidula from two small white fungi growing 

 on a water-soaked log at the side of a lake at Englefield, Berks. 



