May, 1884.] 265 



NOTES ON TENTHREDINIDM. 



BT P. CAMERON. 



{Continued from Vol. xis, j;. 135.) 



Since the publication, in 1882, of my Men. Pliyto. Hymen., i, I 

 have only been able to record one additional species to those described 

 in it, namely : — 



la. DOLERUS PRATORUM. 



Tenthredo pratorum, Fall. Acta, 1808, 64, 27. 



Tenthredo {Dolerus) equiseti, Klug, Berl. Mag., viii, 298, 225 ; 

 Htg., Blattw., 233, 9. 



Dolerus pratorum. Thorns., Hym. Sc, i, 281, 5. 



Black ; segments 2 — 6 of abdomen, and femora, and tibiae red. Tlyes ohlong, 

 inner orbits margined. 3rd joint of antennae longer than 4tli ; tegulse black, fuscous, 

 or white ; labrum white. 



Length, 8 — 9 mm. 



Sometimes the clypeus is white, and one specimen (a- $) has the flagellum red- 

 dish. 



The oblong eyes readily separate it from the other species with 

 red-belted abdomens, it being the only species of this coloration with 

 oblong eyes. 



Taken by Mr. Ed. Saunders at Chobham. It is not, I believe, 

 a common species, and has been only recorded from Sweden, Germany, 

 and France. 



Nematus xanthopus, Andre, Brischke and Zaddach = Dinura 

 stilata, Klug. In regard to this, I should mention that the vast 

 majority of the specimens of Z>. stilata, have only one radial cellule, 

 and even with those specimens in which the transverse radial nervure 

 is present it is faint. I have reared a specimen with two radial cel- 

 lules from larvae similar to those described by Brischke and Zaddach, 

 under the name of xantliopics, have carefully examined it with some 

 types received from Herr Brischke, and have also compared the saws 

 of the two and find them quite identical in all respects. 



Nematus orbitalis, n. sp. 

 Pallid-green ; the head fi'om the base of the antennse, including the whole of 

 the frontal area, the vertex between the sutures, and the occiput in the middle behind, 

 meso- and metanotum, and a broad continuous band on dorsum of abdomen, black. 

 Antennae as long as the thorax and abdomen together ; black above, brownish 

 beneath; 3rd joint nearly as long as the 4th. Wings hyaline, nervures blackish, 

 costa pale at the base, stigma greenish-white. Vertex finely punctured, sutures deep, 

 an indistinct transverse suture behind the ocelli. Hind tarsi lined with black above, 



Y 



