OIMBEX SYLVARUM. 



1. ClMBEX SYLVABUM. 



Vol. II, PI. V, fig. 1, ? ; la, Head ; 1 b, Antenna ; 1 c, 

 Tarsus. Vol. II, PL XII, fig. 8, Larva. 



Tenthredo sylvarum, Fab., E. S., ii, 105, 4; Pz., F. G., Heft 88, 



pi. xvi. 

 Cimbex sylvarum, Fab., S. P., 16, 4; Voll., Tijd. Ent., xriii, 33, 



pi. iii. 

 Tenthredo femorata, Pz., 1. c., Heft 26, pi. xx. 



tristis, Fab., Iter. Norw., 334 ; E. S., ii, 106, 7. 

 Cimbex tristis, Fab., S. P., 17, 7. 



varians, Leach, Z. M., iii, 105 ; Ste., 111., vii, 6, 2. 



europ&a, Leach, Z. M., iii, 105, 4. 



femorata, $ , Fall., Acta Holm., 191, 3 ; Mon., 8, 2 ; 



Lep., Mon., 31, 83; F. Fr., Hym., 5, 7 ; 

 Drewsen, Ann. Ent. Fr., iv, 169 (1835) ; 

 Ste., 111., vii, 6, 1. 



variabilis, var. femorata, Klug, Berl. Mag., 1, 78 ; Htg., 



Blattw., 6, 3. 



biguetina, Lep., Ann. Soc. Ent. Fr., ii, 455. 



betulae, Br. and Zad., Schr., Ges. Konig., ii, 233 and 



249, pi. ii, f. 1 (lar.). 



fagi, Br. and Zad., 1. c., 233, 251. 



lutea, Thorns., Hym. So., i, 19, 1. 



siberica, Kirby, List of Hym., i, 4, pi. 1, f . 1, $ , 387 ; 



pi. xvi, f. 3, J. 



Black ; antennae and tarsi luteous, body covered with a black or 

 fuscous, longish pubescence ; wings hyaline, a blotch along the trans- 

 verse basal nervure, and the outer margin fuscous. 



Length 7 13| lines. 



Ab. a. Black; antennae and tarsi luteous (tristis). 



b. Black ; antennae and tarsi luteous, the three or 

 four middle segments of the abdomen red. ? and $ 

 (sylvarum). 



c. As in b, but abdomen entirely red $ , rarely ? . 



d. Black ; antennae, tibiae and tarsi luteous, the three 

 or four middle segments for the greater part pallid 

 testaceous, or more rarely the middle segments are 

 entirely pale testaceous (varians, biguetina, Lep.). 



e. The antennas, the head, except the vertex, pro- 

 notum, the fore part of mesopleurae, the middle lobes 

 of mesonotum at the sides, scutellum, legs, and abdo- 

 men, reddish-yellow ; wings yellowish ; the pubescence 

 is shorter and paler than usual. 



This is the most variable and commonest of the 



