1912.] 157 



the ventral plates as well as the dorsal. The tegulse are white or 

 yellowj and the scutellum bears a round pale yellow spot... 



T. maculata, Geoffr. 



— Much smaller (9-11 mm. long). The central yellow abdominal band 



occupies only one dorsal-plate (the next but one after the propodeum) 

 and the sides of that following it. The venter is unbanded (black in 

 the ? , sordid yellow in the J ) ■ The tegulse and scutellum are 

 generally black, the apical abdominal segments yellow above. (The 

 antennse in this species are distinctly incrassate before the apex, as in 

 Allantus : but it differs from any of our British Alla7itus spp. in having 



the stigma completely fuscous ! ) T. teniula, Scop. 



(^ hicincta, F. 



15. Body green and black, the green fading in old specimens to a sordid straw- 



yellow. (Scutellum green) 16. 



— No part green. (Scutellum nearly always black, but in one species bright 



yellow.) The usual coloration is red or black, or a combination of these 

 colours, with occasionally a little white on the antennse, pronotum, 

 pleurae, coxae, &c 17. 



16. Stigma, antennae, and most of the body above black (the sides and belly 



mostly green). Eatherlike a dark specimen of Rhogogaster viridis, but 

 easily distinguished by its converging eyes and fuscous — not green — 

 stigma. An exceedingly common species T. mesomela, L. 



— Stigma, antennae in part, and most of the body (above as well as beneath) 



olive-green: dorsum of abdomen usually with a rather narrow black 

 central vitta T. olivacea, Htg. 



17. Antennae entirely black 18. 



with some joints white or yellow, at least beneath 21. 



18. Clypeiis and labrum black, contrasting strangely with the mandibles, 



which are yellow T. mandibularis, P2. 



— Clypeus and labriun white or yellow 19. 



19. Abdomen entirely black, legs red. (If there be a white mark on the 



metapleura, the insect is the variety dispar, Kl.) T. atra, L. ? 



— Abdomen black and red 20. 



20. Edge of , pronotum and tegulaj black T. aim, L, i 



— Edge of pronotum yellow or white, tegulae red (or, in var. lachlaniana Cam., 



white) T. moniliata, Kl. 



21. Antennte with joints 8, 7, and the apex only of 6, white. Abdomen of <? 



black at the base, the intermediate and apical segments red (often 

 somewhat pallid in the centre of the intermediate segments) : that of 

 the ? may be black entirely, or the apical half may be red. Sides of 

 propodeum and metapleura marked with white. Stigma pale at the 

 base T. livida,!,. 



