1908.] 11 



Perkins (op. cit., PL VII, fig. S). It is borne slightly dorsal to the 

 longitudinal axis of tbe puparium, on the somewhat flattened pos- 

 terior surface, and a little ventral to it is another dark, but much less 

 definite, area, marking the position of the larval anus. 



The following is Becker's diagnosis of the imago (op. cit , p. 40) : — 

 "J ? . Nigro-fuscus opacus, abdominc maculis lateralibus griseis 5 frontc et 

 facie nigris, albido-micantibus ; antennis nigris, tcrtio articulo ovato acuminato, 

 sectmdo articulo in mare pilis longioribus ; pedibus totis nigris, halteribus con- 

 coloribus ; liypopygio maris rima oblonga liorizontali ; liypopygio feminse magno, 

 non sulcato, cum terebra curvata ; alarum nervo quarto longitudinali non furcato, 

 costa? abscissa tertia in mare quarta duplo longiore ; stigmate complete 



Long. corp. 4, alar. 4 mm." 



With regard to other British species, Becker states that P. mela- 

 nostolus in some points resembles P. (iter, Meigen (= P. campestris, 

 Latreille). although the two species belong to different groups of the 

 genus. The resemblance lies especially in the form of the third joint 

 of the antenna ; but P. mclanostolus is readily to be distinguished by 

 the dull, essentially differently dusted, abdomen,' and by the quite 

 black legs. 



In the specimen under consideration the legs are entirely black, 

 excepting a very small piceous portion at the bases of the tibiae, not 

 in any way to be compared to the pale yellowish-white portions of the 

 legs in P. campestris. 



University Museum of Zoology, 

 Cambridge : 

 November, 1907. 



PKORIDM IN DUMBARTONSHIRE ; WITH DESCRIPTION OF A 

 NEW SPECIES.. 



BY J. R. MALLOCH. 



During the last two years 1 have devoted considerable time to 

 the collection of the Phoridce, principally at Bonhill, with the intention 

 of adding at least a few species to our local list, which has meantime 

 not a single representative of this Family included in it. I fortu- 

 nately met with fair success, and am able to record about half of the 

 species at present in the British list and a few others that are new 

 to it. One of these latter, i. e.,pubericomis, which is described below, 

 is a new species which has occurred in considerable numbers at Mur- 

 roch Glen, near here, on a fungus (Aoaricus sp. ?). I do not suppose 



