British Species of Allotrince^ 5g 



i6 (ii) Head for the greater part black (entirely or with the oral region 

 piceous-red). 



17 (20) Legs clear yellow. 



18 (19) Radial cellule large, elongated, more than twice longer than 



wide ; the femora slightly infuscated. Cvcuviscripta, Htg. 



19 (18) Radial cellule small, not twice longer than wide ; femora clear 



yellow. Minuta, Htg. 



20 (17) Legs more or less fuscous-testaceous. 



21 (28) Radial cellule elongated ; the second abscissa of the radius at 



least one half longer than the first. 



22 (23) Head piceous-red, radial cellule wide, the basal abscissa of 



radius a little more than half the length of the second. 



Curvicornis, Cam. 



23 (22) Head black, radial cellule elongate, basal abscissa of radius 



more than half the length of the second. 



24 (25) Length scarcely i mm. ; basal joints of the antennte clear yellow. 



Dolichocera, sp. nov. 



25 (24) Length over l mm. ; basal joints of antennre fuscous or black. 



26 (27) Head piceous, black on top ; the 4th and 5th joints of antennte 



deeply curved. $, • Ancylocera, Cam. 



27 (26) Head black ; the 4th and 5th joints of the antennae but slightly 



curved. Longicornis, Htg. 



28 (21) Radial cellule minute, not much longer than wide, the 3rd 



abscissa of radius curved. 



29 (30) Head black ; the abdomen strongly compressed, broadly piceous, 



as long as the thorax. Microcera, Cam. 



30 (29) Head reddish, castaneous on top ; abdomen shorter than thorax, 



not compressed. Mullensis, Cam. 



31 (i) Radial cellule open. 



32 (49) Thorax black. 



33 (40) Head red. 



34 (35) Radial cellule greatly elongated. Macrophadnus, Htg. 



35 {34) Radial cellule not greatly elongate. 



36 (37) Collar broadly red. Mactdicollis, Cam. 



37 (36) Collar entirely black. 



38 (39) Base of abdomen red ; antenna; thickened towards the apex, 



broadly and darkly infuscated ; legs reddish -testaceous. 



Basiinacula, Cam. 



39 (38) Base of abdomen black ; antennae hardly infuscated at the apex, 



legs yellowish testaceous. Filicornis, sp. nov. 



40 (33) Head black. 



41 (44) Radial cellule minute, more or less trapezoidal, legs clear yellow. 



42 (43) Antennae clear citron-yellow, hardly infuscated towards the 



apex ; radial cellule twice longer than broad ; the third 

 abscissa of the radius not distinctly curved. Citripes, Thorns. 



43 (42) Antennae blackish, yellow at the base ; radial cellule not twice 



longer than broad ; the third abscissa of radius roundly and 

 distinctly curved. Trapezoidea, Htg. 



