72 MANDIBULATA. HYMENOPTERA. 



Sp. 45. agilis. Aniennis tkorace sublongioribus, corpore violaceo-nigro, labro 

 mandibulisquefusco-testaceis,pedibus cum condylis luteis, tarsi s posticis nigris. 

 (Long. Corp. 3^ I'm.; Exp. Alar. Ql lin.) 



Te. (All.) agilis. Kkg.—A.\\. agilis. Steph. Catal. 336. No. 3900. 



Shining, somewhat violet-black ; antennae rather longer than the thorax ; 

 labrum and mandibles testaceous-brown; legs pale testaceous, with a 

 yellow hue, the coxae and trochanters pale luteous ; the 4 anterior femora 

 with a dusky cloud above, and the 2 hinder tarsi black; wings yellowish, 

 with the nervures and stigma brownish, the base of the last pale. 

 Not common : found at Darenth wood in July. 



Sp. 46. rufipes. Niger, nitidus, viandibulis pedibusque ferrugineis, tarsis 2 



posticis nigris. (Long. corp. 3 — 3f lin. ; Exp. Alar. 6 — 1^ lin.) 

 Te. rufipes. Ziegler. — St. Fargeau Mon. 81. — All. rufipes. Steph. Nomen. 



2d edit. col. 127. 

 Shining black: mandibles dusky ferruginous; legs bright ferruginous, with 



the 2 hinder tarsi black; wings hyaline, slightly fuscescent; the nervures, 



costa, and stigma fuscous. 



Abundant in woods, within the metropolitan district, in June ; 

 also found in Scotland. 



Sp. 47. melanocephalus. Pallide luteus, capite pectorisque macula nigris, alis 



hyalinis. (Long, corp. 3 lin.; Exp. Alar. 7 lin.) 

 Te. melanocephala. Fabricius. — All. melanocephalus. Steph. Catal. 336. 



No. 3905, 

 Pale luteous : antennse with a black line above ; head black ; mouth and 



clypeus pale; mandibles pitchy at the tip; thorax pale, with 3 black spots; 



metathorax dusky ; abdomen pale, its base dusky ; legs yellowish; breast 



with a black spot in the middle ; wings hyaiine, the nervures dusky, stigma 



pale ; in the 2nd submarginal areolet is a black dot. 

 The male has the basal segment of the abdomen varied with black, and the 2 



apical joints spotted with the same. 



Not common : found at Coombe wood in June. 



Genus XXI.— TENTHREDO Auctorum. 



Antennae 9-jointed, generally rather long and slender, especially in the 1st 

 section, the basal joint robust, and, with the 2nd, short, 3rd and 4th longest, 

 each of equal length, 5th rather shorter, remainder very gradually decreas- 

 ing in length and thickness : labrum rounded : mandibles 4-dentate : clypeus 

 scarcely emarginated : head broad : eyes small : ocelli 3 : ivings ample ; 

 anterior rather long, with 2 marginal areolets, divided by a slightly curved 

 nerv'ure, and 4 submarginal ones, of which the 1st is somewhat rhombic, the 

 2nd longest and narrow, receiving 1 recurrent nervure, the 3rd triangular, 

 receiving 2 recurrent nervures, and the 4th extending to the apex : abdomen 

 rather long, somewhat obtuse at the tip in the males, a little depressed and 



