EMPHYTUS SEROTINUS. 277 



It occurs in Sweden, Silesia, Holland, France and 

 Russia. 



9. EMPHYTUS SEROTINUS. 

 Plate III, fig. 12, Larva. 



Empliytus seroiinus, King, Berl. Mag., viii, 288, 215; Ste., 111., 



vii, 252, 22 ; Htg., Blattw., 252, 22 ; 

 VoU., Tidj. Ent. (2), v, 61-63, pi. 

 2 (lar.); Kalt., Pti., 66-4; Thorns., 

 Opus., 273, 3; Hym. Sc., i, 195, 

 11; Cam., Fauna, 21, 5; Andre, 

 Species, i, 258, pi. xvi, figs. 9, 10 ; 

 Cat., 32 * 28. 



Dolerns abdominalis, Lep., F. Fr., pi. 8, fig. 3 ; Mon., 118, 245, 



Black, shining, very slightly pubescent ; palpi obscure testaceous, 

 irregularly marked with black at base and apex ; abdomen (except at 

 base), legs (except at base and apex of posterior tibise and the tarsi, with 

 the sheath, which are all black) yellow. Wings hyaline, costa fuscous, 

 stigma black ; nervures pale at the base ; tegulre and posterior calcaiia 

 yellow; base of tibina pale yellow; blotch and cenchri white. ? and <$. 



Length 4 5 lines. 



Easily known by its shining body, yellow legs and 

 abdomen and black antenna. E. cist us, Klug. (from 

 Austria), differs in having the antennne white at the 

 base. E. cents (recorded by Stephens from Devon- 

 shire, 111., vii, 92, but probably in error) has a testa- 

 ceous line on each side of the eyes and the pleura3 

 yellow. 



The larvse are common in June on the oaks, feeding 

 on the young growing leaves in the usual Emphytus 

 fashion. The bare cylindrical body has a light-green 

 ground colour, but this is obscured by a white powder 

 which covers the body all over ; the head is also 

 covered with powder, it is dark grey above and pale 

 yellow below the eyes, the eye spots being black. At 

 the last moult the powder is lost ; the body becomes 

 yellowish-green and very shining, the head clear yellow, 

 darker on the vertex. With me they pupated in the 

 ground without spinning a cocoon, and yielded the 

 imagos in September and October. The eggs must be 

 laid then, and remain probably unbatched till May, for 





