BY ARTHUR WHITE. 179 



grey-brown, with two very closely approximated dark 

 brown median stripes, and indistinct side-stripes; bristles 

 black ; scutellum with two or four black marginal bristles. 

 Abdomen black, with hind-margins of segments white, 

 almost bare, but with a little white pubescence ; ovipositor 

 rather short. Legs with femora black ; anterior tibiae 

 blackish ; middle tibiae yellow-brown with apex black ; 

 posterior tibiae yellow-brown ; tarsi yellow-brown, with tips 

 of joints black ; bristles on femora, tibiae, and tarsi entirely 

 black. Wings hyaline, the cubital fork long and narrow, 

 and barely contracted in the middle ; second posterior cell 

 ■conspicuously contracted at a short, distance from the wing- 

 rnargin. 



This species bears a close resemblance to both jV. cali- 

 ginosus and.3\ vulgatus, but can be distinguished by the 

 venation, the second posterior cell being long and conspicu- 

 ously contracted at a short distance from the wing-margin, 

 instead of being short and broad and not contracted, and, 

 on the other hand, by the cubital fork being longer and 

 narrower and less contracted, also by the darker colouring 

 of the anterior tibiae. 



N . ahditus is a late autumn species. It may be met 

 with not uncommonly settled on the ground or on fencing 

 posts. My dates range from March 1 to April 26. 



Neoitamus geaminis. White. 



Thorax yellow-brown, with one broad dorsal and two 

 lateral brownish-black stripes ; abdomen brownish-black, 

 v/ith conspicuous light yellow-brown segmentations; 

 femora black above, red beneath ; tibiae light yellow-brown, 

 with apex black ; moustache entirely yellow ; posterior 

 thoracic bristles white. 



Length. Male, 11.5 mm.; female, 12.5 mm. 



Hab. Bagdad Valley. 



Male. Face and front covered with pale yellow tomen- 

 tum ; moustache pale yellow, scanty, without any black 

 bristles. Thorax yellow-brown, with a broad median and 

 two lateral brownish-black stripes; sides bright yellow- 

 brown ; posterior bristles white ; scutellum with two weak 

 yellow terminal bristles. Abdomen brownish-black, with 

 hind-margins of segments light yellow-brown, and bearing 

 yellow lateral bristles,. Legs with the femora broadly 

 black above, red beneath; anterior and middle tibiae red, 

 with black bristles, posterior tibiae yellow-brown with 

 white bristles ; apex of tibiae and tarsi black. Wings ting- 

 ed with brown. 



