174 THE DIPTERA-BRACHYCERA OF TASMANIA, 



Scutellum with only two marginal bristles. 4 



4. AVings suffused with brown at apex of second 



basal cell, at anterior cross-vein, and at base of 

 cubital fork; bristles of abdomen black; mou- 

 stache of female almost entirely white. 



Caliginosus, White. 



Wings hyaline or evenly shaded; moustache of 

 female largely black. 5 



5. Second posterior cell of wings broad and not con- 



tracted; front tibiae largely red; bristles of ab- 

 domein white; ovipositor very long; summer 

 species. V ulgatus, White. 



Second posterior cell of wings conspicuously con- 

 tracted at a short distance from the wing-m^ar- 

 gin ; front tibiae blackish ; abdomen practically 

 bare; ovipositor unusually short; late autumn 

 species. Abditus, Sp. nov. 



6. Thorax with one broad median stripe; posterior 



thoracic bristles white. Graminis, White. 



Thorax with tv/o median stripes ; all thoracic 

 bristles black. Brunneus, White. 



Besides the above species, xY. fraternus, Macq. has been 

 described from Tasmania ; this species T am unable to' dis- 

 tinguish unless it is the same as N . liyalivennls, Ricardo, 

 which in Tasmauian specimens frequently has the wings 

 shaded with brown, and like X. fraternus has four scutel- 

 lar bristles. 



Neoitamus flavicinctus, White. 



Thorax black with yellow stripes; abdomen black, wdth 

 segmentations yellow, more distinct in female than in the 

 male ; legs jet-black ; posterior tibiae and first joint of 

 posterior tarsi with short, thick, ruddy pubescence on their 

 inner sides ; wings tinged with brown, darkest towards tlie 

 tips. 



Length. Male, 13.5 mm. ; female (including oviposi- 

 tor), 15 mm. 



Hab. Bagdad Valley. 



Male. Face covered with golden tomentum. Front 

 black. Moustache large and bushy, black. Antennae 

 black, the first and second joints with black bristles, the 

 third joint scarcely longer than the first two togethei. 

 Thorax with two black median stripes, divided by a thin 

 yellow line, and bordered outwardly with yellow ; sides 

 of dorsum broadly black, bordered with yellow below; 

 scutellum yellowish, with numerous long marginal blade 



