156 SCIOPTEKYX COSTALIS. 



SCIOPTEEYX COSTALIS. 

 PL IX, fig. 6, ? . 



Tenthredo eostalis, Fab., E. S., ii, 109, 22. 



Hylotoma eostalis, Fab., S. P., 24, 15. 



Tenthredo eostalis, VilL, Lin. Ent., 79 ; Lep., F. Fr., pi. 7, fig. 

 5; Hon., 108, 314; King, Berl. Mag., 

 viii, 78, 65 ; Htg., Blattw., 290, 13. 

 fulvivenia, Schr., En., 338, 682. 



Allantus eostalis, Rudow, S. E. Z., xxx, 93, 7. 



Sciapteryx costalis, Ste., 111., vii, 56, 1 ; Cam., Fauna, 16, 1 ; 

 Andre, Species, i, 408; Cat. 51,* 1. 



Short, thick, black ; head and thorax strongly and coarsely punctured, 

 covered with a grey pubescence ; greyish-white are the inner orbits of 

 the eyes, clypeus (except the extreme apex, which is reddish-brown), 

 labrum, mandibles, a line along the pronotum, coxae in part, the greater 

 part of the femora and tibiae in front, a thin line on the third, fourth, 

 and fifth abdominal segments above, the greater part of the succeeding 

 above, as well as the sides and belly. Tegulae, base of costa, stigma, 

 and a spot in front of the latter ochreous-yellow ; the rest of the costa 

 and stigma, with the nervures, black. Wings fuscous. The antennae 

 have the apical joints brownish. $ 



The female has only the inner orbits of the eyes in the middle, the 

 labrum, tibiae in front, and the apical segments of the abdomen, above 

 and at the sides, white; the coxae and femora are entirely black; 

 trochanters pale. 



Length 4 4| lines. 



This is the only British species known of this genus, 

 which contains two other European forms likely to 

 occur here, viz. 8. consobrinus, KL, which differs from 

 it in having the mouth, orbits of the eyes, costa and 

 stigma quite black ; the white line on the pronotum 

 being also smaller ; the tegulas only brownish in front, 

 black behind, and the wings hyaline ; and S. artica, 

 Thorns., which has the clypeus deeply incised in the 

 middle; antennae bare; head and thorax alutaceous, 

 and the tibise and tarsi luteous. 



Costalis does not appear to be a very common species 

 in Britain, although it is widely distributed. Stephens 

 records it from Coombe "Wood, and near Bristol and 

 Hertford. Mr. Parfitt takes it in Devonshire, and Mr. 

 Dale at Leelworth, while Dr. Sharp has captured it in 

 Braemar and Thornhill. It is found early in the 

 season, early in April in England, May in Scotland. 



