66 [August, 



rounded, divergence not equal to the base of either, length a little greater 

 than the breadth across the base. Antenna yellowish, 9 — 10 joints black. 



Thorax green or greenish-yellow, rarely yellow, clear red, or reddish-yellow ; pro- 

 notum, in the latter cases the anterior portion (dorsulum) meso- and metathorax 

 frequently darkest on the disc. Elytra clear, transparent, scarcely 2| times as 

 long as broad, nerves yellowish, frequently somewhat dusky, especially towards 

 the apex ; stigma moderate in width at the base, terminating about in a line 

 with the middle of the area (cubitalis costce), measured on the marginal nerve, 

 enclosed between the furcations of the cubitus ; radius extending to the apex, 

 concave towards the costal margin in a line with the apex of the stigma, and 

 recurving before its termination in the marginal nerve. Legs pale green, 

 yellowish or reddish-yellow. Thighs, in the autumn brood, red. Tarsi brown. 



S . Abdomen above, green or dark brown, genitalia yellow, or reddish-yellow, genital 

 plate, inner margin concave next the apex, convex towards the base, processes 

 about three times as high as broad at the base, narrowest at the apex, which is 

 black, posterior margin with a gentle wave. 



$ . Abdomen green ; upper genital plate brownish, lower green. Length, 1\ lin. 



Lee : 7th June, 1880. 



[Psylla peregrina was found by me in Scotland in August, 1876, 

 not scarce on the mountain-ash (Pp*us aucuparia), a tree of the same 

 Natural Order as the hawthorn. — J. W. D.] 



NOTES ON TENTHREDINIDAS. 

 BY P. CAMERON. 



{Continued from vol. xvi,p. 267). 



ATHALIA SCUTELLARIA, Sp. %OV. 



Luteous, pilose, the head (except the apex of clypeus and the labrum, which 

 are white), meso- and metanotum (except the apex of middle lobe of mesonotum, 

 and the greater part of scutellum, which are luteous), and the upper half (in some 

 cases only the third) of pleurae, black. Legs luteous, the apices of the four posterior 

 tibise, and the joints of all the tarsi broadly annulated with black. Antennae black, 

 11-jointed, testaceous on the under-side. Wings hyaline, nervures, costa (save at 

 extreme base, where they are testaceous) and stigma black : J similar, but with 

 mesonotum entirely black. 



Length, 2 — 2\ lines. Alar exp., 4f — 5 lines. 



Allied to A. rosce, but distinguished by its smaller size, more 

 pilose body, luteous sternum and scutellum in the $ , by the 3rd sub- 

 marginal cellule being shorter in proportion to the 2nd, and at the 

 same time wider at the base, by the 3rd joint of the antennae being 

 more than double the length of 4th, which is not the case with rosce, 

 while the tarsal joints at the base are of the same colour as the 

 rest of the legs, and not whitish as in the Linnean species. 



