96 Syiphidae. 



squamula with long, fine, branched hairs. Pluniula well developed, 

 densely hairy with simple or very slightly branched hairs. 



With regard to the developmental stages Reaumur describes and 

 tigures a larva (iMém. IV, 1738, 477, PL XXXI, figs. 13-16) found in 

 water in a hole in a tree; it was somewhat like an Eristalis-lRwa. 

 and had a short tail; the pupa had four short horns; according to 

 the imago flgured it seems to have been some Chrysogaster s. 1. 

 Brauer mentions (Denkschr. d. Kais. Akad. d. Wissensch. XLVII, 1883, 

 69) that Marno found a larva similar to an Eristalis-\diV\2i {O. nohilis) 

 at the border of a fen among decaying leaves. Beling mentions 

 (Verh. zool. bot. Gesell. Wien, XXXVIII, 1888, 3) that he has bred 

 L. metallina {metallica) and C. viditata from larvæ found in the mud 

 in a ditch, and he describes the larva of viduata; it is 6 mm long, 

 2 mm in diameter, flat below, arched above, of a dirty yellowish 

 colour. The single segments divided in corrugations by fine furrows; 

 the number of segments is given as twelve. The dorsal side with 

 fine hairs in transverse rows; towards the tapering posterior end 

 longer haired; the posterior end has at each side some strong, pointed, 

 long-haired warts, and it terminales into a short, attenuating, brownlsh 

 yellow tail-shaped part with the spiracles. Above the mouth opening 

 two approximated two-jointed organs. The larvæ were found on ^^U 

 and the imagines of the two species developed on '^^/s — ^^/a. I possess 

 a male and a female of C. Macquarti together with their puparia, 

 bred by Mr. Esben Petersen. The pupæ were found in flood refuse 

 on ^''k and developed soon after. The puparium answers well to 

 the description of the larva of C. viduata given by Beling. It is dirty 

 yellowish, about 6 mm long (the tail excluded); above it has fine, 

 somewhat thread-like spines in transverse rows, increasing in length 

 behind; they are specially long at each side of the somewhat atten- 

 uating posterior end; the end itself terminates into an about 1 mm 

 long, thin, tail-shaped spiracular process, and this again ends with a 

 thin brown, pointed styliform part which in the larva evidently has 

 been telescopically retractile. The anterior spiracular tubes are charac- 

 teristic; they are long, about 2 mm, thin, cylindric and somewhat 

 ring-like corrugated in the outer half; they are approximated at the 

 base, each protruding through a brown disc, and the two discs 

 touching each other in the middle; the tubes point upwards and for- 

 wards and are diverging. There are no larval spiracles visible. 



The species of Chrysogaster s. 1. occur in humid piaces, in fens, 

 on humid meadows and at horders of water; they generally sit on 

 flowers, often on Ranunculus and Umbelliferæ; they are not very 

 lively and may easily be caught. 



