Dohrniphora. 147 



a dead crow on ^''Z?, probably present there for depositing eggs. Weiss 

 has (Biill. Soc. Hist. Nat. de l'Afrique du Nord, 1911, 34) written on 

 the metamorphosis of D. chlorogastra (perhaps = vemista, see Schmitz, 

 Jaarb. Natuurh. Genootsch. Limburg 1919, 101); the larva lived on 

 carrion of small mammals, especially of mice; the females lay 30 — 40 

 eggs, the larval stage lasts 15 — 21 days, the pupal stage 25 — 40 days. 

 The American species D. vemista has been bred from cow-peas (prob- 

 ably decaying) (Malloch, Proc. U. S. Nat. Mus. 43, 1912, 432), and 

 Jones describes (Entom. News, XXIX, 1918, 299, PL XVII) egg, 

 larva and pupa of this species; they were found in late summer in 

 the pitchers of Sarracenia flava^ these pitchers being at that time 

 filled with accumulated insect remains in which the Phorid larvæ 

 lived; he found that the larva hatched after three days, the duration 

 of the larval stage was about 16 days and of the pupal stage the same. 

 The African species Bequaerti was bred from putrid snails (Schmitz, 

 Jaarb. Natuurh. Genootsch. Limburg, 1914, 105). I have myself 

 bred florea and Oldenbergi from pupæ taken in flood refuse, florea 

 was taken on ^^U, the imago come on ^U, Oldenbergi was taken in April 

 and May and developed soon after. Further I possess two pupæ of 

 concinna taken on a dead Lacerta on '/s and developing on ^^/s. - — As 

 before said only of one species the larva is described, viz that of 

 D. venusta, described by Jones 1. c. According to this author, the 

 larva is flattened dorsally, brownish white ; the surface roughened with 

 fine, sparse, microscopical hairs, a little larger on the processes; meso- 

 and metathorax and the abdominal segments bear each a transverse 

 row of six fleshy, pointed processes, the lateral ones being the largest, 

 and round the hind margin of the last segment there are six similar 

 processes. On the ventral side there are six longitudinal rows of smaller 

 processes, those of the outer row on each side papillate, the other 

 low and inconspicuous. The posterior spiracles lie above on the middle 

 of the last segment. Length 4 mm. The puparium is elliptical, dull 

 mahogany brown; the larval processes visible, but almost obsolete 

 except the lateral. The anterior spiracular tubes are rather large, 

 flat and straight, and they are distant and diverging; they seem to 

 be rather peculiar as they are described and figured as wand-like, 

 their edges fringed with rigid, cleft filaments; (the author says that 

 they protrude from the fourth segment, no doubt their place is on 

 the second abdominal segment). The eggs are described as elongated 

 oval, not quite symmetricai, white, pearly, slightly polished and 

 minutely but not closely punctate; 0,65 mm long and 0,27 mm broad. 



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