156 fJwiy. 



being a little nearer together than the ventral. Each stigniatic plate is sur- 

 rounded, except in the region of the external scar, with a fringe of branched, 

 golden hairs, which are nearly always stuck down to the sides of the elevation 

 on which the stigmatic plate is situated. 



Fncomi/ia gravis Haliday (figs. 1 B, 2 B, 2 d). 



The puparia before me are 5| to 6f mm. long, dark pitchy-reddish to 

 almost black. First segment presenting dorsally two shining, slightly concave 

 jireas, one on either side of the middle line ; second segment rugulose and dull 

 dorsally, third less so, remainder of dorsal surface, particularly the hind end, 

 shining. Form rather depressed, dorsal and ventral surfaces divided by a 

 definite ridge along the sides. Segmentation well-marked by constrictions 

 at the sides of the body, these becoming feebler towards the hind end, while 

 dorsally they are almost obsolete. Each of the anterior segments shows a 

 marked dorso-laleral impression on either side. Venti'al surface appearing 

 under a low power destitute of spines, but under a compound microscope the 

 front part of each segment is seen to bear nuraevous, sniuous, transverse series 

 of very minute spines, as in Coelopa. Anterior spiracles (fig. 2 b) with about 

 13 to 16 papillae, in a close series, but not quite as close -as in Coelopa. 

 Postei-ior spiracles (fig. 2 d) usually a little more elevated than in Coelopa 

 pilipes. The stigmatic plates are formed and orientated on the same plan as 

 those of Coelopa, but the surface within the curves of the C's is broadly pale, 

 so that there are 3 broad, missbapen-crescentic areas pale testaceous, con- 

 trasting with the surrounding dark pitchy-reddish. The branched hairs appear 

 rather longer than in Coelopa. 



Orygma luctuosum Meigen (fig. 2 e). 



The only puparium available is one from which a fly has emeraed, and 

 which is not in good condition. It is about 7 mm. long, nearly cylindrical in 

 section and tapering at both ends, rather light reddish-brown, with surface 

 minutely alutaceous and rather dull, with the constrictions between the seg- 

 ments well-marked, and with transverse series of short black spines (quite 

 conspicuous under a hand-lens) in these constrictions on the ventral surface. 

 Anterior spiracles missing from the specimen. Posterior spiracles (fig. 2 e) 

 very much more elevated than in either the Coelopa or the Fucomyia. Each 

 elevation is very long, and has a curious projecting flap or lobe situated 

 dorsally or dorso-laterally. The three C-shaped ridges are much curved, so 

 that their ends almost meet, and the lowest of tlie three is pushed inwards 

 towards the middle line of the puparium, while the external scar is pushed 

 dorsalwards alongside of the uppermost C. The fringe of branched hairs is 

 present, but in bad preservation, and is not shown in fig. 2 e. 



II. SUPPOSED PARASITISM IN IWMALOTA. 



Recently Mr. Wattrston submitted to me a single Dipterous 

 puparium and a small Stapli\]inid which lunl emerged from it. 

 The puparium was found bj Mr. W. Falconer, F.E.S., at Butternab 

 Wood, in the vicinity of Hudd(.Tsfield, on September 2Sth, 1918, in tlie 



