120 Mr. R. E. Turner on Fosson'al Ilymenoptera. 



a more slender species, the first abilominal segment is much 

 narrower and proportionately longer, the scutclluin is rather 

 less convex, the third abscissa of the radius is much longer, 

 and the second recurrent nervure is received further I'rom 

 base of the third cubital cell. 



Dimorpliothynnus hicolor, Wesfcw. 



Enteles hicolor, Westw. Arc. Ent. ii. p. 143 (1844). $ . 

 Thijnnus ziuf/crlei, D. T., Cat. Ilym. viii. p. 119 (1897). $. 

 ? ji/ia(/i(/aster hccvwrrhoiclalis, Gner. Mag-, de Zool. xii. (1842). c?. 

 ? Thiinnus kchcri, 1). T., Cat. llvni. viii. p. 110 (1897). 6 ■ 

 Enteles h(cmorrhoidalis, Turn. Proc. Liuu. Soc. N.S.W. xxxii. p. 242 

 (1907). $. 



I used the name hcemorrJioidalis for this species in my 

 revision of the grou)), probably correctly. But since that 

 time I have received the male of Bhagiijaster crtstaneus, Sm., 

 which would fit Guerin's very brief description equally well. 

 There can therefore be no certainty as to Guf^rin's species 

 without seeing the type. I). Jinibriatus, Sm.^cJjis a dis- 

 tinctly larger species. 



The pair of D. hicolor in tlie British Museum is from 

 Perth, W.A. There is a series of D. fiinbriatus from 

 Adelaide, S.A., and Yaliingup, W.A. 



D imorphothynnus Jimhriatas , Sm. 



Thynnusfiynbriatm, Sm. Cat. Tlym. B.M. vii. p. 42 (1859). $ . 

 Rhagigaster apicalis, Sm. Cat. Hym. B.M. vii. p. 63 (1859). <^ . 

 Thy'nnus ottonis, D. T., Cat. Hym. viii. p. 112 (1897). (S . 



In my revision of the Thynnida? (Proc. Linn. Soc. N.S.W. 

 xxxii. p. 24:2, 1907) I treated this species as a synonym 

 of D. hcemorrkoidalis, Guer. Further material has come to 

 hand since and shows that I was mistaken. The female 

 fimhriatus differs from hicolor, Westw., in the shape of the 

 head, Avhich is shorter and much more strongly rounded 

 posteriorly, the pronotum and scutellum are shorter ; the 

 median segment is very short, only half as long as in 

 hicolor ; the carinse on tiie second dorsal segment are some- 

 what stronger ; the pygidium is much narrower, being 

 very broadly oval in hicolor, elongate and narrowed to the 

 apex in fimhriatus, the striation of the pygidium is much 

 coarser, and there is a tuft of long pale hairs on each side, 

 springing from beneath the dorsal plate of the pygidium, 

 which is absent in hicolor. The mala hicolor has the enclosed 

 triangular space on the clypeus narrower than in fimhriatus; 

 the seventh dorsal segment more rounded at the apical angle.=, 



