1906.] 209 



— Smaller (0— S mill. ]oug). S antenrife little loiicrer than the abflomen, ? head 



subquadrate, with nearly or quite black tenipora apicalis, Htg. 



8. Mesoi^leuvae distinctly, thou{?h sparsely, punctured. Body black in both sexes, 



pale only at the apex pleuralis, Thorns.* 



— Mesopleurnp ini punctate ; or with very fine and close] punctures, and with ti»e 



whole ventral surface in the ? ? pale 9- 



9. Scutellum swollen and punctured. Mouth, pronotum, tegulse, abdomen, and 



legs bright orange. Head and thorax shining black. Wings rather dusky, 

 with yellow costa and stigma. (A very distinct species)... a/6 ipewtti*. Htg. 



— Scutellum flat and impunctate. Abdomen dark above ; or, if mostly pale, the 



head and thorax above are largely pale also 10. 



10. Head pale brownish-yellow, but with a large black mark occupying the ocellar 



region. Antennae more or less pale, or rufescent at least beneath 12. 



— Head for the most part, and antennae, black. Thorax and abdomen mostly 



black above ; in the ? ? the ventral surface is entirely pale, in the <? (? it is 

 so at the apex only 1 1 • 



11. Stigma pale yellow ; femora pale testaceous vagus, F. 



[leueogaster, C). 



— Stigma dusky brown ; femora more or less black obductus, H-tg.f 



{obducius, conductus, C). 



12. Very small species (t— 5 mill, long), with remarkably yellow wings. In the 9 



the thorax and abdomen are for the most part black, the head (except about 

 the ocelli) and the legs yellow, the antenna? slightly rufescent. The <? is 

 peculiar in being more brightly coloured than the ? ; its thorax above is 

 largely yellow, as is the abdomen beneath, and the antennae (except the two 

 basal joints which are usually black) rumicis, Fall. 



— Large species (6—9 mill, long), with perfectly glassy and iridescent wings (not 



at all yellow ! ). The body-colour in both sexes is green in life, fading more 

 or less after death to ochreous-yellow ; head, thorax, and abdomen rather 

 sparingly marked with black, in the style o( Jlaviventrls, irisignatus, &c. 

 (The insect superficially resembles a green Pteronus of the miliaris group). 

 The antennae are more or less pale scutellatus, Htg. 



Notes. 

 (a) In Cam. Mon., vol. iv, p. 200, suhbifidits, Thorns., is given as 

 a FacJii/nematus. The subhifidus of Thomson, however, is certainly a 

 Priaiiphora : and Mr. Cameron's species appears to be the same- at 

 any rate it cannot be a Pachi/nemafus, if he is correct in saying (vol. 

 ii, p. 139) " apex of clypeus truncated." Prist, suhhifida, Thorns., 



* I suppose Ihis^canaliculatus, C, though Konow does not say so (c/. the synonymy of 

 canalicuLatus in the Monograph). I have seen a specimen taken by Mr. A. J. Chitty, and identi- 

 fied by Konow as pleuralis. 



t Cojiductus, Euthe, according to Thomson and Konow, is a ? variety of this, in which the 

 hind femora are quite black. Most of the British ? ? I have seen belong to this form. 



8 



