Platypeza. 27 



found in Callimyia, but fewer in number and not f eathery or serrated ; 

 sometimes the filaments are quite short and spine-like, only just 

 to be seen. The head and prothorax are lying on the ventral side; 

 on prothorax are anterior spiracles, somewhat protruding, and 

 on last segment above are the posterior spiracles. With regard to the 

 mouth hooks the records difTer; Leon Dufour figures two long hooks; 

 Bergenstamm says that there are no mouth hooks, but the opening 

 has on each side transverse rows of small teeth, similar to the radula 

 in snails, and Brauer reproduces this description. Thereagainst de 

 Meijere found mouth hooks with three teeth on the ventral side, thus 

 like the facts in Callimyia. There is every reason to think that Bergen- 

 stamm's statement is due to some mistake, and that mouth hooks 

 are always present. Above the mouth opening there are as usual small 

 maxillary palpi and antennæ. By the opening of the puparium an 

 upper piece is detached, comprising meso- and metathorax and the 

 first abdominal segment (thus as in Callimyia when metathorax 

 and first abdominal segment here are considered as fused). — I have 

 myself examined larvæ and pupæ of furcata and a puparium of 

 boletina, both from fungi. The larva of furcata shows much resem- 

 blance to de Meijere's description of infumata. It is cylindrical, 

 not flattened, of yellowish colour; its filaments are short and spine- 

 like, only seen with a strong lens; at the front margin of prothorax 

 are two, somewhat long filaments, on mesothorax six and on meta- 

 thorax and the abdominal segments four on the dorsum in a trans- 

 verse middle row and one at each side; the last segment has four 

 at the hind margin. (When in earlier descriptions are mentioned only 

 two dorsal filaments on the segments in the middle, I think the two 

 outer are smaller and have not been observed.) Head and partly 

 prothorax lie below on ventral side; on the last segment are two 

 upwards directed hooks in the middle of the hind margin. The larva 

 consists very distinctly of twelve segments, the head included. An- 

 tennæ, maxillary palpi and anterior and posterior spiracles are present 

 as usual. There are two tridentate mouth hooks. The pupa is more 

 flattened; the opening takes place as in infumata. — The puparium 

 of boletina is quite similar, likewise with quite small, spine-like fila- 

 ments, the number of which seems to the same. 



The larvæ have all been found in various fungi, and they seem 

 exclusively to live here. They pupate in the ground, but are also re- 

 corded to pupate above it in the neighbourhood of the food place. 

 Several species are as imago only or especially seen in autumn, others 



