404 GERTRUDE RICARDO. DIPTEREN II. 



Erephopsis Rond. 



Erephopsis novae-guineensis n. sp. 



Type (female) and another from Mounts Hellwig (Lorentz). 



A reddish yellow species, with hairy eyes and the first posterior cell very narrowly 

 open at border in the type, in the other spécimen it is closed with a very short stalk on 

 the one wing, on the other wing closed on border. Length 18 mm., without proboscis. 



From the description of Pangonia testacea Macq. (Dipt. exot. I, p. 103) this might 

 possibly be that species which is described as having the first posterior cell half open, from 

 New Holland, length 15 mm. but not having seen the type in the Paris Muséum it is impos- 

 sible to décide the question. 



Face reddish brown with brown hairs. Palpi a little darker in colour, the second joint 

 large, fiât, ending in a short point; on its upper border curved. Beard yellowish white. 

 Proboscis 4'/ 2 m. m. in length. Antennae same colour as face, slender, the first joint stout, 

 conical, the second very small, round, the third narrow, a little broader at base, the first two 

 joints with brown hairs. Forehead almost parallel, dull reddish brown with brown hairs. Eyes 

 with short pubescence. Thorax shining reddish brown, pubescence at sides brown ; breast 

 yellowish red with long whitish pubescence. Scutellum reddish, shining. Abdomen reddish 

 yellow with some black pubescence on dorsum, not very noticeable, with brown hairs at 

 sides becoming yellowish at the apex where the sides of the fifth and sixth segments are 

 transparent yellow; underside paler, shining. Legs pale reddish yellow, the tarsi darker. Wings 

 clear with a yellow tinge on foreborder extending to the first posterior cell and across the 

 base of discal cell, veins brown, the first posterior cell closed or nearly so, no appendix. 



Silvius Meigen. 

 Syst. Beschreib. III, p. 27 (1820). 

 The only species of this genus as yet described from the Australasian and Oriental 

 Région are three and one doubtful species viz. 



Silvius marginatus Walker, List. Dipt. I, p. 189 (Tabanus) (1848). Ricardo, Ann. Nat. Hist. (7), 

 VIII, p. 296 (1901). From Australia. 



Silvius dimidiatus v. d. Wulp, Tijd. Ent. XI, p. 102 PI. III, figs 3 — 5 (1868). Osten Sacken, 

 Ann. Mus. Civ. Genova, XVI, p. 478 (1880). Ricardo. Ann. Mag. Nat. Hist. (7), VIII, p. 296 (1901). 



Silvius silvester Bergroth, Ent. Zeit. Stettin, LV, p. 71 (1894). Ricardo, Ann. Mag. Nat. Hist. (7), 

 VIII, p. 296 (1901) and? Silvius nitescens Wlk., Trans. Ent. Soc. London, IV, p. 125 (1857); 

 Ricardo, Ann. Mag. Hist. (7), VIII, pp. 296, 297 (1901). A maie with only the head and wings 

 left, labelled Australia. 



The BERGROTH species is recorded from Central Queensland. 



One subspecies and two new species are now described. 



1. Silvius dimidiatus v. d. Wulp. 



The type was found on the Island of Salawati, and Osten Sacken recorded a female from 

 Doré, New Guinea. 



In Prof, de Meijere's Coll. are females from Regen Island, Digul (Dr. Koch) and Bivak Island. 



The female found by OSTEN SACKEN differs from the type as he remarks, in the 



colour of the femora which are almost wholly yellowish rufous, instead of black, and the abdomen 



