TENTHREDOPSIS NASSATA. 117 



the eyes. Stn'dula may be known from it by its 

 longer and thinner antenna?, the colour of the body is 

 much brighter ; the antennal fovea is deeper, but the 

 frontal area is not so clearly indicated, the clypeus is 

 more transverse at the apex, the base of legs always 

 paler than the rest, and the pleurae marked with yellow. 

 Dorsii'ittata may be separated by the black meta- 

 thorax and coxse, by. the band on abdomen being 

 broader at the base and more distinct throughout, 

 the band in iinn-nata being not much more than a 

 darkening in colour compared to the colour of the rest 

 of abdomen. 



Apparently rare. Bishopton on birch in June, 

 Bannoch. 



20. TBNTHEBDOPSIS NASSATA. 

 PL XVIII, fig. 5, Saw. 



Tenthredo nassata, Lin., S. E., ed. xii, 926, 38, <J ; Fab., S. P., 

 59; Fall., Acta Holm., 1808, 116, 56 

 ( ?) ; Lep., Men., 84, 246 ; Ste., 111., 

 vii, 75, 5. 



tilia, Pz., F. G., Heft 91, pi. 13. 



mdanorrhcea, Gmel., 136 ; Lep., F. Fr., pi. 4, fig. 4 ; 

 Mon., 85, 248; Ste., 111., vii, 75, 6. 



wutabili*, vnr. nassata, Kl., Berl. Mag., viii, 197, 142 ; 



Htg., Blattw., 308, 37; Evers., 

 Bull. Mosc., xx, 49, 22. 



Perineum sordida, Thorns., Hyin. Sc., i, 266, 3 (exparte). 



nassata, Cam., Fauna, 14. 1 ; Andre, Species, i, 433, 

 pi. xx, fig. 3 ; Cat, 52*, 6. 



Tenthrcdopsis nassatus, Cam., Tr. Ent. Soc., 1881, 572. 



Yellowish-testaceous; mouth, sometimes the inner orbits of the eyes, 

 scutellum, two spots behind it, and cenchri, yellowish-white. Wings 

 hyaline, stigma fuscous, with the basal half white ; second transverse 

 cubital nervure interstitial. Spurs reaching to near the middle of 

 metatarsus. 



The $ has the head clear yellow, except the vertex, which is black, 

 \ horax yellow, mesonotum black, except the scutellar spots, four ante- 

 rior coxa3 pale yellow, base of abdomen yellow, the rest of body and legs 

 as in ? , except that the hinder tarsi are paler, almost white. The last 

 abdominal segment has, in the middle, a horse-shoe-shaped depression 

 with a blunt carina in the centre. The l.asal joints of the antenna? are 

 yellow, marked with black above. 



Length 6 6| lines. 





