25 Platypezidae. 



and pulvilli small, a little larger in male than in female. Empodium 

 quite small. Wings as in Callimi/ia, but broader at base and alula 

 somewhat large, subcostal vein without bristles and discai vein forked 

 at apex, the upper branch long, the lower short or quite short, reaching 

 the margin or often incomplete; anal cell shorter or longer than the 

 rest of the anal vein. Squamulæ small. 



The developmental stages of some species are known; the larva 

 of a species, determined as boletina^ is mentioned by v. Roser (Wiirt- 

 temb. Correspondenzbl. XI, 1834, 269) and by Westwood (Introd. 

 II, 1840, 554, Fig. 130, 17); it was found in fungi; but as mentioned 

 below under boletina the larva cannot belong to this species as it 

 shows lateral filaments such as are not present in boletina; possibly 

 it has been modesta. Leon Dufour describes and figures (Ann. d. Se. 

 Nat. 2, XIII, 1840, 159, PI. III, fig. 24—26) larva and pupa of holo- 

 sericea = dorsalis from Agaricus campestris, taken on ^^/g, it pupated 

 22/9 and the imago emerged on ^^/g to middle of October. Frauenfeld 

 describes (Verhandl. zool. bot. Gesell. Wien, XIV, 1864, 68) the larva 

 of fasciata from Lepiota polymyces, taken at the beginning of October, 

 the imagos emerged after about six weeks. Bergenstamm describes 

 and figures (Verhandl. zool. bot. Gesell. Wien, XX, 1870, 38, Tab. 

 III A) the larva of holosericea — dorsalis from Agaricus campestris, 

 taken at the end of August, developing after a mouth. Perris men- 

 tions (Ann. Soc. Ent. de Fr., 5, VI, 1876, 231) the larva of subfasciata 

 in Agaricus campestris, the imago emerged ^Vs ^^^ ^^Is-, ^^^ larva 

 of holosericea; both are considered as dorsalis, which is, however, 

 not sure, as the author gives some differences. Finally de Meijere 

 describes and figures (Tijdschr. v. Entom. LVI, 1911, 241, Tab. 17) 

 the pupa of infumata from a Polyporus taken in autumn, the imagos 

 came in April and May. Thus at present the developmental stages 

 of four species seem to be known: dorsalis, fasciata, infumata and sp., 

 perhaps modesta. Further Zetterstedt mentions (Dipt. Scand. III, 

 1844) pupæ of boletina and fasciata from fungi on Prunus cerasus, 

 and a pupa of consobrina in fungi; this latter pupa he terms "nuda", 

 it has thus not had conspicuous filaments. 



The larva is more or less elongated oval, somewhat flattened 

 or sometimes cylindrical; it consists of twelve segments, the head 

 included; along the sides and on dorsum there are filaments, generally 

 one at each side on each segment and two on the middle of the dorsal 

 side, thus four longitudinal rows; on the last segment there are two 

 or three on each side; the side filaments thus are similar to what is 



