BY ARTHUR WHITE. 277 



1913. 



(next to be described) aud N. hyalipennis, Ricardo. From the 

 former it cau be at once distinguished by the absence of any 

 suffused patches on tbe wings; from the latter by its smaller 

 size, thorax with two narrow instead of one broad median 

 stripe, scutellum with two hlack instead of (usually) four 

 yellow bristles, and by the coloured portions of the tibiae being 

 dark red instead of pale yellowish-red. With reference to 

 JV. hyalipennis, described by Miss Ricardo from Victoria, it 

 may be as well to mention that Tasmaniau specimens show a 

 certain amount of variation ; two of my specimens have the 

 wings perfectly hyaline, but in two others they are distinctly 

 tinged with brown, whilst one specimen has the weak scutellar 

 bristles black instead of yellow, although it does not show 

 any other variation from the type. 



JV. vidgatiis is a common Tasmanian species. It may be 

 found settled on logs or fn.llen branches in the bush. It 

 appears on the wing about the beginning of December, and 

 may be found throughout the summer. 



NeoitciJHus caUgifiosns, Sp. no v. 



Thorax black and brown; scutellum with two long terminal 

 bristles, one white and one black ; abdomen black, with well- 

 marked white segmentations ; femora black ; tibiae red, with 

 apices black ; wings hyaline, suffused with brown at apex of 

 second basal cell, at discal cross-vein, and at base of cubital 

 fork. 



Length. Female, 12-14 mm. 



Locality. Bagdad Valley, Tasmania. 



Female, Face covered with grey tomentum ; moustache 

 white, with a few black hairs intermixed ; front black. 

 Antennae black, the first two joints with long black hairs. 

 Thorax with two median, narrowly-divided, brownish-black 

 stripes, and two broad lateral stripes ; sides of thorax light 

 brown ; bristles black ; scutellum brownish-grey, with two 

 long, terminal bristles, one white and one black. Abdomen 

 black, with segmentations conspicuously white ; black bristles 

 at sides, and a little short, white pubescence on dorsum. 

 Legs with femora black ; tibiae red, Avith apex black, the hind 

 pair darker than the others ; first joint of tarsi and base of 

 other joints red, remainder black. Wings hyaline, with the 

 apex of second basal cell, the discal cross-vein, and base of 

 the cubital fork (also sometimes base of second posterior 

 cell) suffused with brown. To the naked eye this merely 

 gives the impression of the veins being darkened in the areas 

 specified, but examination with a low-power pocket lens 

 shows the presence of suffused portions of the wings. 



