Mr. W. F. Kirby on new Hymenoptera. 141 
Figs, 3-5. Elasmopus rapax. Second gnathopod, d, showing three 
stages of development of the hand, 
Fig. 6. The same, Last pereeopod. 
Fig. 7. The same, Last uropods. 
Fig. 8. The same. Telson. 
Fig. 9. Chetrocratus Sundevalli (Lilljeborg). First gnathopod, ?. 
Fig. 10. The same. Second enathopod, ?. 
Fig. 11. Chetrocratus assimils (Lilljeborg). Second gnathopod, 9. 
Puate XII. 
Figs. 1-3. Chetrocratus Sundevalli (Lilljjeborg). Three stages of develop- 
ment of hand of second gnathopod in male, 
Fig. 4. Melphidippa macra, Norman. First gnathopod. 
Fig. 5, The same. Second gnathopod. 
Fig. 6. The same. Last peropod, the thigh (basos). 
Fig. 7. The same. Last perzeopod, terminal joints. 
Fig. 8. Melita dentata (Kroyer). First gnathopod. 
9 
Fig. 9. The same. Second gnathopod. 
Fig. 10. The same. Last perseopod, the thigh (basos). 
Fig. 11. Gammarus locusta (Linn.), The telson (one half). 
Fig. 12. Gammarus marinus, Leach. The telson. 
Fig. 13. Gammarus campylops, Leach. The telson. 
XIV.—Descriptions of new Species of Tenthredinide, Cyni- 
pide, and Chalcidide tn the Collection of the British 
Museum. By W.F. Kirpy, Assistant in the Zoological 
Department, British Museum (Natural History). 
In the present paper I offer descriptions of six interesting 
new species which have recently been received belonging to 
families of Hymenoptera which I had previously arranged. 
Tenthredinide. 
SELANDRIINZ. 
Selandria limbata. 
Exp. al. 18 millim. 
Female.—Head, antenne, and jaws black, rhinarium and 
nasus pale yellow ; thorax pale yellow above, with very large 
black spots on the frontal and lateral lobes, and with the 
sutures round the scutellum and postscutellum marked with 
blackish ; prothorax beneath pale yellow, with a large black 
spot on each side, followed by a small one, the latter just 
before the front cox; mesopectus and mesopleura shining 
black ; metapectus pale yellow, with a large black spot on 
