ASHMEAD : CLASSIFICATION OF THF, CHALCII) FLIES 



467 



the abdomt?n move depressed, the pedicel as well as the scape being yellow ; other- 

 wise it is hardly distinguishable from the female. 

 Brazil : Chapada ; Santarem. Ten specimens. 



Genus RILFA'A Asbmead. 



RiLEYA ORBITALIS, sp. IIOV. 



Feiuale. — Length 2 mm. Head and thorax, except the i)ron()tnni which is more 

 or less brownish or yellowish, mostly black, the abdomen brown, the apex black ; 

 orbits, face below antennse, scape, tegulse, and the legs, except the basal half of tlie 

 hind femora, yellow or brownish-yellow, the tips of the tibia; and the tarsi paler or 

 yellowish-white ; flagellum subclavate, light brown, joints five and six of funicle 

 wider than long. Wings hyaline, the veins pale yellowish ; the marginal vein is a 

 little more than twice the length of the stigmal, the postmarginal vein being long, 



The abdomen is conic-ovate, cylindrical, nearly twice the length of the thorax, 

 pointed at apex, the third segment very large, occupying the greater part of the 

 whole surface of abdomen. 



Brazil : Santarem. 



Family LXIV. PERILAMPlDiE. 



Genus PERILAMPUS Latieille. 



Peeilampus brasiliensis, sp. nov. 



(Plate XXXIV., Fig. 4.) 



Female. — Length 4.8-5 mm. Blue, the head behind the ocelli, the fore part 

 of the middle mesothoracicl obe, and the inner front angle of the lateral lobes 

 teneous ; the head is smooth with several longitudinal striae between the eyes and 

 the scrobes, the pronotum coarsely, irregularly punctate, the middle mesothoracic 

 lobe and the scutellum coarsely transversely striate, the lateral mesothoracic lobes 

 with some long, oblique strite posteriorly. The extreme tips of the tibiaj and the 

 tarsi are testaceous. 



Brazil : Chapada, in April. Two specimens. 



Family LXV. ELKJHARID.E. 



Genus EUCHARIS Latieille. 

 EvcHAKis DiCERODERA Spinola ? = JTopa/a. 



Eucharis dicerodeni Spinola, Mem. Acad. Sc. Torino (2), XI II., 185L p. 43, cT. — 

 Dalla Torre, Cat. Hym., V., 1S98, p. 360. 

 Brazil. 



