2 Orthorrhapha brachycera. 



anterior ventral roof arises a complicate median organ, tlie penis and 

 its shealh, which stretches somewhat backwards; to each side of it 

 two pairs of variously shaped inner lamellæ or gonapophyses arise, 

 the posterior (or median) and the anterior (or lateral) inner lamellæ, 

 which stretch backwards; at the end of the hypopygium two more 

 or less scale-like lamellæ are inserted, the outer or apical lamellæ; 

 they are more or less connected in the middle; I think they are 

 placed on a small apical segment. — It will be seen that the hypo- 

 pygium answers well to that in the Dolichopodids, the posterior and 

 anterior inner lamellæ or gonapophyses answering to the median and 

 lateral inner lamellæ in the Dolichopodids, and the outer or apical 

 lamellæ to the same in the Dolichopodids; the hypopygium otherwise 

 being much of the .same construction with a ventral cavity roofed 

 over at the base, and the penis stretching backwards from it between 

 the inner lamellæ ; also the hypopygium is likewise bent in under the 

 venter, but it is here not unsymmetrical. As said there seem to be 

 five abdominal segments, but the long first abdominal segment is 

 evidently formed by the coalescence of two, the dividing line being 

 still visible; at the base of the hypopygium there seems to be a small 

 segment, and perhaps one more; if so the hypopygium would in the 

 normal way be formed of the ninth segment. — In the female ab- 

 domen has six visible segments, the first long and likewise formed of 

 two; there are thus in reality seven segments; a very small apical 

 (eighth) segment is also seen, and at the apex are two small lamellæ. 

 Legs slender, simple, only the front tarsi with the four last joints 

 somewhat dilated in the male. The femora and tibiæ have more or 

 fewer brislles. Glaws and pulvilli small. No em podium present. 

 Wings very characteristic and with an aberrant venation ; they are of 

 elongated elliptical shape, pointed at the apex; alula and axillary lobe 

 very small or wanting. Mediastinal and subcostal veins very short; 

 radial vein terminating a Httle above the apex; the cubital vein issues 

 quite near the base, and terminates just at the apex; it is unforked 

 and there is thus one cubital cell; the radial and cubital veins are 

 converging oulwards; the discai vein arises apparently from the posticål 

 vein near the middle of it; it has a long fork and there are four 

 posterior cells; the posticål vein is branched quite near the base, its 

 lower, short branch going downwards to the anal vein; this latter 

 long, reaching about to the middle of the wing; it shows a very 

 characteristic feature, as in the male it terminates in the posterior 

 margin, but in the female curves upwards and terminates in the posti- 

 cål vein (figs. 2—3) ; the so-called medial cross-vein is near the base and 

 very oblique, it goes from near the base of the cubital vein down- 



