16 NOTES ON SOME AUSTRALIAN STRPHIDAE (DIPTERA), 



touching in the male for a little distance and widely separated in the female; the 

 hind femora are swollen and do not bear a process, a clump of hairs or spines 

 spines. 



Type of the genus. — 0. nigra, Macquart Tasmania. 



Orthoprosopa grisea, Walker. 



(PL 1, fig. 4.) 



Heliophilus griseus Walker, Ent. Mag. ii, 1835, p. 472. Id., Froggatt, Austr. In- 

 sects, 1907, p. 303. 

 Meredon contrarius Walker, List Dipt. B.M., iii, 1849, p. 599. 

 Orthoprosopa nigra Macquart, Dipt. Exot. suppl. 4, 1849, p. 153, PI. xiii, fig. 5. 

 Id,, Skuse, Proc. Linn. Soc. N.S.W., iii., 1888, p. 423 (larvae). Id., 

 Froggatt, P.L.8.N.S.W., xxi., 1896 p. 83, PI. ix, figs. 6-8. 

 Synonymy. — This species, well known under the name Orthoprosopa nigra, 

 appears to have been described by Walker in 1835 under the name Heliophilus 

 griseus, and again in 1849 as Meredon contrarius; in both these descriptions the 

 species is recorded from "New Holland." 



Maequart's genotype was published during the same year as Walker's second 

 description, and Tasmania was given as the locality, but the species is not repre- 

 sented from that State in recent collections. 



Genus Eristalis Latreille. 



Note. — Under this genus four names are placed as synonyms under three 

 species. Of the remainder, E. smaragadi Walker has been recognised as a dis- 

 tinct species, but E fulvipes Macquart, E. roderi Bergroth and E. maculatm do 

 Meijere have not been recognised in the collections examined. E. tenax Linnaeus 

 is a common introduced species that occurs throughout Australia. 



Eristalis pulchella Macquart. 



Eristalis pulchella Macquart. Dipt. Exot. suppl. 1, 1846, p. 127, PI. xi, fig. 3. 

 Eristalis aebutius Walker, List Dipt. B.M., iii, 1849, p. 630. 



Hah.— Queensland to Tasmania, and Western Australia. Specimens from 

 Roekhanipton and King George's Sound are in the Macleay Museum. 



Eristalis decorus Macquart. 



Eristalis decorus Macquart, Dipt. Exot. suppl. 3. 1848. p. 41. Id. Sehhier, 



Novara Reise, Dipt. 1868, p. 362. 

 Eristalis sinuata Thomson, Eugenies Resa, Dipt. 1868, p. 488. 

 Hab. — Queensland and New South Wales. 



Eristalis punctulatus Macquart. 



Eristalis punctulatus Macquart, Dipt. Exot. suppl. 2, 1847, p. 58; and suppl. 4. 

 1850, p. 137. Id., Grimshaw, Fauna Hawaiiensis, iii, part 2, 1902, p. 

 82. Id., de Meijere, Tijd v. Ent., Ii, 1908, p. 265. 

 Eristalis agno Walker, List Dipt. B.M., iii, 1849, p. 626. 

 Eristalis epitome Walker. Ins. Saund. Dipt., 1852, p. 250. 



Synonymy.— This is a rather variable species for which the above synonymy 

 appears to be correct. Specimens in various collections are labelled Helophilw 

 bengalensis Wiedemann, but the species has contiguous eyes in the male and 

 therefore cannot belong to the genus Helophilus. In a letter to Dr. Fer°uson 



