420 



Phoridae. 



European species (fig. 122), as I do not know whether the other species 

 show the same construction; the four first abdominal segments are 

 normal, the next segment is large and it has no chitinized tergite; it 

 is narrowed behind and continued into a long connecting membrane; 

 the following segment is long, narrow and cylindrical and has also 

 behind a long connecting membrane and is not distinctly chitinized; 

 then follows a cylindrical, chitinized segment at the end of which 

 the small apical segment with the lamellæ is foimd ; 

 the last segments together form a long, somewhat 

 ovipositor-like part. At the front margin of the 

 third segment at each side is a small, flat papilla 

 or elevation of unknown function. At the basal 

 part of the large, unchitinized segment following 

 af ter the fourth, there is a somewhat large, specially 

 thin-skinned and in the living state translucent 

 area of a regular outline, also of unknown function. 

 Abdomen is, as in the male, apparently bare, only 

 at the hind margin of the cylindrical segment 

 following after the large, unchitinized one there 

 are long, erect hairs, and this segment has also 

 distinct, short hairs. If we now count the abdominal 

 segments, according to the given description, we 

 come to the following result: first there are four 

 normal segments, then a large, unchitinized fifth 

 segment, a narrow, cylindrical sixth segment, a 

 chitinized seventh segment at the end of which 

 the small apical segment and the lamellæ, together 

 representing the eighth and ninth segments; this 

 would give one segment less than found in Aphio- 

 chaeta; I am, however, convinced that the above way of counting is 

 not correct, for the segment counted as the sixth evidently answers 

 to the seventh in Aphiochaeta, which generally also has distinct hairs 

 round the hind margin; and likewise the segment counted as the 

 seventh no doubt answers to the eight in Aphiochaeta; now it seems 

 to me that there is, at the base of the large, unchitinized segment, 

 counted as the fifth, a small chitinization present, which would then 

 represent the real fifth segment, but I have not been able to demon- 

 strate this with certainty; (if the said chitinization represents the 

 fifth segment, the facts would here be much as in Chaetoneurophora 

 thoracica). How this now may be, no doubt the large, unchitinized 



Fig. 122. 



Ph. berolinensis $, 



abdomen from 



above. 



