1907.J 



41 



look of the insect. Further examination shows several other characters, but these 

 are not recognisable in the net. In the first place the hairs of the thorax are paler 

 than in villosidus and rather more abundant, and the puncturation is finer. The 

 wings are unusually pellucid, and their nervures, especially the stigma, are very 

 pale ; the propodeum is rather longer and more rounded posteriorly, and its sculp- 

 ture rather finer ; the posterior margins of the abdominal segments are pale, and the 

 abdomen is clothed at the sides and on the apical segments with greyish-white 

 hairs ; the whole insect appears to be less densely black than villosulus. The (J is 

 quite distinct from villosulus, resembling more closely that of breviceps ; it is, how- 

 ever, generally a trifle larger, its face is rather longer, and the joints of the flagellum 

 are wider than long. The wings are pellucid and pale-veined as in the $ . 



Eight $ obtained after many hours' collecting along the coast 

 between Southbourne and Hengistbury Head on Sypochoeris radicnta 

 amongst numbers of villosulus, July, 1906. During the last few days, 

 I have seen two or three females, sent to me by Major Nurse o£ 

 Bury St. Edmund's, taken at Eastbourne in August, 1906. 



St. Ann's, Woking : 



January bth, 1907- 



A NEW BRITISH FLEA. 



BY THE HON. N. CHARLES EOTHSCHILD, M.A.., F.L.S. 



Ttphlopstlla isacanthus, sp. nov. 

 Allied to Typlilopsylla pentacanthus, but differs in the following 

 characters : — 



The fifth genal spine, instead of being short and broad as in T. pentacanthus, is 

 the same shape as the others, being about equal in length to the second. This fifth 

 spine in isacanthus is not placed so far dorsally as it is in pentacanthus. The frontal 

 notch of the head is more developed in the present species. In T. isacanthus the 



Fig. 1 — peniacantkus. Fig. 2 — isacanthus, 



bristle placed at the anterior edge of the antennal groove is larger than in T.penta- 



D 



