TENTHREDINID.E. — CEPHUS. 103 



Sp. 21. erythrocephala. Plate xxxviii. /. 4.. — Ccerulea, alis fuscis, capite 



(fcetnineo) ruhro (masculo antice testaceo). (Long. corp. 4|r lin. ; Exp. Alar. 



10§ lin.) 

 Te. erythrocephala. LinnL — Ly. erythrocephala. Steph. Catal. 340. No. 3981. 

 Antennffi black j head bright testaceous, with the apex of the mandibles and a 



quadrate patch on the crown, in which the ocelli are placed, blue-black ; 



thorax and abdomen also entirely rich blue-black ; legs the same, with the 



tip of the anterior femora and the tibite ferruginous ; wings violet-brown. 

 The male has the head blue-black, with the mouth and all beneath the 



antennae testaceous. 



Extremely rare : found in June near Bristol, and in the west of 

 England. 



§ 8. Lahrum minute. Antennw consisting of numerous articulations, about 21, 

 clavate, or filiform : collar long and narrow : ovipositor exserted. 



Genus XXIX.— CEPHUS, Latreille. 



Antennas moderate, slightly clavate, thickening gradually from the base to near 

 the apex; basal joint largest, globose; 2nd very short, subglobose ; 3rd, 

 4th, and 5th elongate, 4th being longest, 6th to the 9th gradually decreasing 

 in length, the remainder very short and transverse, apical one ovate : palpi 

 with the penultimate joint short, oval, sometimes eccentric: mandibles Z- 

 dentate, the intermediate tooth shortest : head transverse, broad, produced 

 between the antennae : eyes large, prominent : ocelli 3 : wings ample, anterior 

 broad at the apex, with 2 marginal areolets, the 1st small, of an elongate 

 lozenge-shape, the 2nd large, elongate-lanceolate, and 4 submarginal ones, 

 nearly equal, the 3rd being somewhat the smallest, and receiving 2 recurrent 

 nervures, the 2nd and the 4th extending to the apex : abdomen elongate, 

 cylindric and obtuse in the males, compressed at the apex, and with an 

 exserted ovipositor in the females: legs nearly equal, slender, posterior 

 rather longest ; intermediate tibia, with a single spur in the middle, posterior 

 with 2 in addition to 2 at the apex of all. Larva elongate, with obsolete 

 legs : feeds on the stalks of corn and buds of fruit-trees : pupa changes 

 within the stalks. 



fSp. 22. Populi. Atro-ccerulea, collare luteo, abdomine luteo maculis transver^ 

 salibus atris, antennis pedibusque nigris, tibiis anticis luteis. 



Te. Populi. LinnL— Turton (!)— Ly. Populi. Steph. Catal. 340. No. 3976, 

 note. 



Antennae black ; head bluish, with the mouth yellow ; thorax also deep blue, 

 with the sides (or collar) luteous ; abdomen luteous, the back with trans- 

 verse black spots; legs black, with the anterior tarsi luteous; wings 

 fuscous. 



Also introduced, but erroneously, by Turton, as British. 



