18 



upper branch of the cubital fork almost always with a recurrent veinlet 

 near its base; all posterior cells open. Squamae large, the alar pair 

 extending more than half-way across the thoracal when they are against 

 each other; thoracal pair obliquely outspread and somewhat covering 

 the hal teres ; and both pairs with inconspicuous fringes, except the tuft of 

 long hairs at the angle. Halteres moderate in size, with the almost 

 globular knob. 



Abdomen broad and short, usually a little a longer than th;.- 

 head and thorax (including the scutellum) together, and distinctly broader 

 than the thorax ; second segment longest and the following ones gradual- 

 ly diminishing in length ; second or third segment broadest, near the 

 anal apex suddenly narrowed and somewhat subpointed at the apex, 

 sometimes gradually narrowed towards the apex ; surface of the abdo- 

 men usually with transverse bands or markings, and usually bearing 

 dense pubescence. Genitalia small and usually inconspicuous. 



Legs with two rather long apical spurs on both the middle and 

 hind tibiae ; fore coxae stout and short, almost shorter than half the 

 length of the fore femora, covering dense and long hairs ; femora all 

 fairly densely covered with hairs ; tibiae with very short pubescence ; 

 pulvilli three, distinct. 



This subgenus is distinguished by its broad abdomen, its eight- 

 annulate third joint of antennae, and its frons without callus. 



Corizoneura is represented by only one species in Europe, and by 

 two or three in oriental regions, while about thirteen species occur in 

 Africa, about four in America, and about eighteen in Australian regions. 

 No species of this subgenus has been recorded from the northern belt 

 of the world up to the present, but I have found a single specimen from 

 Hokkaido in my dipterous collection, and the species undoubtedly 

 belongs to the subgenus Corizoneura. 



