163 CATALOGUE OF DIPTERA 



short body, thick legs, wings unfit for flying, &c. : the antennae 

 have the first joint so minute as not to appear ; the second very 

 large, orbicular, with a bristly top : obliquely on its outer side is 

 inserted the very minute third joint, terminating in a long seta, 

 reflected towards the sides of the breast. 

 Taken in swampy spots about Bexley. 



Opitia nigra. 



The mules are common in September ; the females rare. 



O. lonchopteroides. 



The specimen not being before me, I defer the description 

 of it. 



Pipunculus modestus. Ater opacus, abdominis macnlis, later- 

 alibus cifiereis, antennis acuminatis. Fern. 



Front silvery, above glossed with black : antennas black : knees and 

 base of fore feet yellowish : hypopygium of $ short, globular, with 

 a blackish spine : spots of the abdomen triangular, almost meet- 

 ing in the middle : half as large as P. campestris. (Belongs to 

 division A.) 

 Taken in Kent. 



P. exiguus. Cinereus, alls hyaUnis, pedibus fusco-pallidis, 

 halteribus albis. 



(To division C.) One half smaller than P. spurhis (of which it may 

 be the female, as I have only males of that species, and the colour 

 and wings of the sexes differ greatly in this genus) : obscure 

 cinerous, with pale poisers : wings hyaline, with a faint brown 

 costal spot : legs dusky yellow, thighs and middle of hind shanks 

 brown. 



Spania Fallenii. Nigra, alis denigratis, antennariim articulo 

 tertio Uneari elongato. (Long. . 12.) 



Agrees with the description of S. nigra, except in the antennas, which 

 are entirely different : the third joint is longer than the head, 

 elongate linear : the base a little thicker : the remaining portion 

 flattened and curved outwards, the tip suddenly and obliquely 

 attenuate, probably the insertion of a small style (but if so, it is 

 concealed by the close pubescence, as well as the articulations of 

 the flagellum, if any). The place of this genus is undoubtedly 

 wrong in Meigen's work ; but whether it belongs to the Rhagio- 

 nidce, or rather to some of the neighbouring families, I cannot 



