390 ox THE INSECTS FROM NEW BRITAIN. 



There are two species of Syrphidae in addition to the Einnerus described below. 

 The Eumyiid lluscids are apparently numerous : the most remarkable being an 

 apparently new RutiHa of very brilliant colours, but with the abdomen dark. Of 

 Acalyptratae there are two forms allied to Calobata, and a species of Senopteinna. 



Speaking roughly these Insects seem to be allied to both Australian and Malayan 

 forms. 



Family SYRPHIDAE. 



Microdon pictipenne, n. sp. 



Gracile, nigrum, coerulescenti-micans, hie inde aurato-pubescens, geniculis tarsisque 

 testaceis; alls elongatis, hyalinis, nigro-pictis. Long. 10 m.m. 



Head shining, violet ; the face on each side with a broad line of golden pubescence ; 

 antennae black, with the basal joint yellow beneath, the third joint reaching nearly 

 to the mouth, the seta inserted laterally near its base. Thorax violet, dull, bearing black 

 pubescence, at the sides in front of the wings with golden pubescence ; there are also 

 some golden hairs on the scutellum and along the sides of the dorsum. Abdomen 

 slender, shaped like that of a wasp, violet, the sides and hind margins of the segments 

 with some golden hair. Femora violet, the base of the tibiae and the tarsi yellow, 

 the front tarsi more obscure yellow. Wings elongate, reaching about to the tip of 

 the body, transparent, the nervures very strongly marked, black, the apical portion of 

 the wing with some irregular black marks extending across the vdng. Halteres white. 

 One specimen. 



This species, like others of its congeners, has a pronounced general resemblance 

 to Hymenoptera. 



Eumerus speculifer, u. sp. PL XXXV. Fig. 10, hind-leg. 



Niger, subaeneo-micans, abdomine lunulis albidis ornato, antennis geniculis, tarsisque 

 sordide testaceis. Long. 7 m.m. 



if Head black, between the eyes, above the antennae rendered snow-white by a 

 very fine depressed pubescence : eyes meeting in front, and separated on the vertex 

 by only a very narrow space. Antennae very short and broad, sordid yellow. Thorax 

 black and shining, almost destitute of pubescence ; the crenulations of the scutellum 

 very deep, some of them projecting behind as minute denticles. Squama and antisquama 

 white. Abdomen densely punctate, dull black, more shining at the base ; the basal 

 segment at the sides, with long, pale grey pubescence, on the dorsum with two small, 

 white, almost round marks : the second and third segments each with an elongate, 

 curved, white mark on each side. Legs black, extreme tips of femora and bases of 

 the tibiae sordid j'ellow. Hind leg with the basal joint of the tarsus very much enlarged, 

 and on the under side set with dense adpressed, pure white pubescence, which catches 

 the light in certain directions, and looks like quicksilver; the following joint also some- 

 what enlarged ; the under surface of the tibia also covered with white hair which is 

 not adpressed. One specimen. 



