102 



TKICHOPTERYGID^. 



P. BRisouTi, Matth. 



— nitichmi, Bris., necHeer. 



Sub-genus gillmeisterium, 

 Flach. 



b*. Upper side of thorax scarcely- 

 punctured, sides more rounded, 

 inner basal fovete less distinct 

 than in P. jntsilhim ; elytra more 

 scantily punctured in six or seven 

 irregular longitudinal rows ; hairs 

 much shorter and more slender 

 than in P. imsillum ; antennae 

 with the first two joints and the 

 club nearly always infuscate, the 

 middle joints being more slender 

 than those of P. pusillimn. L. 

 0-8-0-9 mm 



II. Transverse furrows of scutellum with- 

 out a middle keel, with four deep equi- 

 distant foveie ; prosternal process with 

 two furrows between the anterior coxie. 



Basal thoracic fovepe deep, proportional 

 size of outer foveje very variable in 

 respect to inner ; length of pubescence, 

 size and colour also very variable. 

 L. 0*74-0*9G mm. . . . .P. nitidum, Heer. 



= 'pujsillum, Er., nee Gyll. 

 = icevigatum {ex jKirte), 



Matth., nee Gyll. 

 In their subsequent notes Mr. Britten and Mr. Newbery discuss the 

 various species with localities and give illustrations, which show the dis- 

 tinctions of the scutellary keels and punctures, and of the metasterna. 

 The paper is certainly a great addition to ovir knowledge of the genus. 

 The genus Trichopteryx is now under revision by Professor Ericson, 

 Mr. Britten, and others, and we may expect great alterations in the 

 nomenclature; as far, however, as I can judge from specimens returned 

 to myself, I am not prepared to sink as many of Mr. Matthew's species 

 as seems likely to be done by others ; at the same time the number 

 cannot but be largely reduced ; these minute insects seem to vary 

 somewhat in shape, impressions, colour, &c., and ought never to be 

 described except on a fairly long series ; many of Mr. Matthew's 

 English species rest on unique examples. 



Trichopteryx intermedia, Gillm., var. thomsoni, I. B. Ericson 

 (Entom. Tidsk. l'J08, p. 12o). 



A number of specimens of SiTrichopteryx taken by Prof. Beare andMr. 



Donisthorpe at Newtonmore, jST.B., in June 1907, by beating fir-tops were 



identified as above by Prof. I. B. Ericson (Ent. Record, xxi. 1909, p. 58). 



The genus Ptiliam, as far as the British species are concerned, 



will probably not require very much attention. 



