272 Rev. F. D. Morice's Notes on Australian gawflies. 



- General colour much darker- a cuddy brown. Head and 

 mesonotum shining; the punctures on the latter large, bul 

 very sparse. Hind tarsi blackish. . . . Incida, Rohwer. 



The Type is unique, and I have been unable to examine 

 the details of its saw properly, but what I can see of them 

 reminds me of the lewisii group, and especially of ferru- 

 ginea, which it resembles also in coloration, though its 

 sculpture-characters are very different. 



N. S. Wales. Type in B.M. 



18. Dorsum of abdomen red, except at the base and apex which 



are black. Head and thorax black with copious yellow 

 markings (two large spots behind the ocelli, another in the 

 posterior corner of the middle mesonotal lobe, etc.). Length 

 about 16 mm. Wings quite clear. . . cressonii, Westw. 



Perhaps, as Konow thought, this is the $ of brullei, 

 Westw. But its femora are black, which is not the case 

 in brullei $, and this is a character in which the two sexes 

 of a Pergra-species generally agree. 



Adelaide. Type at Oxford. 



— ■ Dorsum of abdomen entirely, or at least throughout its longi- 

 tudinal diameter, dark violaceous or chalybeous . . . 19. 



19. Clypeus, lain inn, apices of hind tibiae and tarsi, and also — 



teste Westwood * — the antennae, black. Abdomen nigro- 

 violaeeous. Wings not distinctly infuscated. Scutellum 



* J have only seen one $ certainly referable to dahlbomii, Westw., 

 namely the original author's Type-specimen, and this, as well as 

 the J which he described with it, has now lost both its antennae. 

 Two oo\ however, in B.M. agree precisely with Westwood's o in 

 other characters, and both these have black (or at least blackish) 

 antennae. Neither these $$, nor eithei of Westwood's specimens, 

 are stated to have come from an\ particular district in Australia. 

 Two $9 i n B.M. were supposed by W. V. Kir by to belong to the 

 same species, but they differ greatly in coloration from the type, 

 having the antennae, clypeus, labrum, and the whole of the tibiae 

 and tarsi yellow. ( klso in one of them the sides of the abdomen 

 ate broadly rufesccnt.). On the whole fchej agree better with 

 christii, Westwood, and come from the same locality, viz. Swan 

 River. But they differ from Westwood's Type of christii in several 

 characters having, e.g. entirely dear and colourless wings, no 

 yellow streaks between the insertions of the wings and the basal 

 corners of the scutellum, the apical lobes of the latter not yellow, 

 as in typical christii, bu1 Mark, and fche abdomen rather violaceous 

 than cyaneous. On the whole I can only think them to be neither 

 dahlbomii nor christii, bul a distinct species of the same group 

 from which I propose the name vacillans. 



