AUSTRO-MA.LAYAN DIPTERA 401 



Pachyrrhina familiaris n. sp. e/* 9 . Rostrum and palpi black, 

 abdomen of the 9 uni color ous , yellow ; in the ^ blackish at 

 the tip only; stigma pale brownish. Long. corp. 9 12-13 mm.; 

 ^ 9-10 mm. 



Female. Yellowish-orange ; antennae black, of moderate length, 

 two basal joints yellow; rostrum and palpi black; a small, 

 brownish , opaque , triangular spot on the vertex , sometimes 

 hardly perceptible. The usual black thoracic stripes have a 

 grayish lustre ; the intermediate one is wedge-shaped , evane- 

 scent in front, before reaching the collare, abbreviated before 

 the suture behind. Scutellum and metanotum uniformly yellow ; 

 halteres yellow, the knob infuscated. Abdomen yellowish-orange. 

 Legs brownish , femora paler at the base. Wings subhyaline, 

 stigma very pale brownish ; discal cell rather small and nar- 

 row ; second posterior cell sometimes short-petiolate, sometimes 

 subsessile. 



Male. Resembles the female, only the antennae are a little 

 longer , the joints of the flagellum are stouter and distinctly 

 coarctate in the middle ; there is a more distinct black spot on 

 the vertex; the intermediate thoracic stripe fully reaches the 

 suture before the collare,- the scutellum, as well as the posterior 

 margin of the metanotum are somewhat tinged with brownish ; 

 the three last abdominal segments are dark brown, but the ge- 

 nitals are yellowish ; the stigma is darker brownish. 



Four 9, one J^\ Mt. Singalang, Sumatra, July 1878 (Bec- 

 cari). 



NB. I have no doubt that the male beloiigs to the same 

 species, the slight difference in coloring notwithstanding. All 

 the specimens are injured from having been kept in spirits. 



Pachyrrhina melanura n. sp. 9 . Yellowish-orange ; four last 

 abdominal segments black. Length: 13-14 mm. 



Head of a saturate yellowish-red (orange), opaque ; front very 

 gibbose ; antennae black, except the scapus, which is yellowish- 

 orange ; palpi brown, more reddish towards the base. Thoracic 

 stripes represented by three wedgeshaped, contiguous, velvet-black 



Ann. del Mus. Civ. di St. Nat. Vol. XVI. (4 Febbraio 1881). 26 



