106 



Phoridae. 



the external morphology of the larvæ. The pupariiim of domestica, 

 according to Keilin, is reddish brown, the ventral siirface much 

 arched, the dorsal flat; the larval head and prothorax are withdrawn; 

 the anterior and especially the posterior end are curved iipwards, 

 the latter often even forwards; all the larval papillæ and minute 

 formations are still present; through the second abdominal segment, 

 near the front margin, two long, attenuating and somewhat diverging 

 spiracular tubes protrude; the length of the puparium is 4,7 — 5 mm. 



The puparium of Bergenstammi (fig. 43) 

 is quite similar to that of domestica^ but 

 it shows on the abdominal segments three 

 instead of two lateral papillæ, a small, a 

 medium sized, and a large; further the 

 papillæ show generally five to six bristles 

 at the end, and the four small processes in 

 the posterior row of bristles show four 

 bristles at the end; the colour is reddish, 

 the length 3,5 — 6 mm. The puparium of 

 immaciilata is, according to Schmitz, like- 

 wise similar to that of domestica and shows 

 the same papillæ as this, but the papillæ 

 are liere much smaller and less conspicuous, 

 they have at the end four, sometimes five 

 bristles; also the other formations and the 

 bristles in the transverse rows are much 

 smaller; the posterior end is curved up- 

 wards, but sometimes straight; the colour 

 is yellowish to dark brown, the length to 

 8 mm. The puparium of notata is of the same circumference as the 

 foregoing, and it is likewise arched on the ventral, flat on the dorsal 

 side, but it differs in being smooth, without bristles or papillæ, only 

 on the lateral margin there is on each of the first seven abdominal 

 segments a small papilla or process; (in such puparia without papillæ 

 or processes the mentioned sensory organs connected in the other 

 pupæ with the papillæ and processes are not absent; on the contrary, 

 they are all present, but lying direct on the surface and not visible 

 macroscopically) ; the anterior and especially the posterior end are 

 curved more or less upwards, sometimes almost not. The spiracular 

 tubes are long. The colour is reddish brown to blackish brown, the 

 length 5 — 8 mm. The puparium of maculata is, according to Keilin 



Fig. 43. Puparium of 

 P. Bersenstammi. 



