Phoridae. 75 



slender; it consists in both sexes of ten segments; the six first have 

 normal, not transformed tergites, but on the ventral side these six 

 segments have no chitinized ventral piates, the venter being thiis 

 membraneous, and this is an important family charcater. The only 

 exceptions from this mie is the occurrence of a ventral plate in the 

 male of Metopina and in the females of Chaetoneurophora thoracica, 

 Trupheoneura luteifemorata, Aphiochaeta Oldenhergi and Chonocephalus^ 

 where a chitinized sixth ventral plate is present. In the male the 

 second and sixth segments are sometimes more or less elongated, or 

 sometimes only the sixth; after the six normal segments follow the 

 hypopygium, but as this answers morphologically to the ninth seg- 

 ment, the seventh and eighth segments thus have disappeared, and 

 the disappearance is total, as no chitinizations are foimd in the con- 

 necting membrane between the sixth segment and the hypopygium. 

 The hypopygium is smaller or larger and somewhat various in shape, 

 but principally of the same construction; it may be described as 

 consisting of a dorsal part or tergite, which bends more or less down on 

 the sides as two large side parts, and a ventrite or ventral plate, more 

 or less covering the opening below between the side parts and of 

 very various shape, smaller or larger; the said side parts may be very 

 various in shape, and the hypopygium may be symmetricai or more 

 or less unsymmetrical ; in some species (in Chaetoneurophora and 

 Paraspiniphora) the left side part is more or less deeply fissured and 

 a special plate moreover may occur here; in other species {Para- 

 stenophora, Trupheoneura) the side parts may be developed as long 

 arms so that a forceps-like organ is formed, the arms may be symme- 

 tricai or more or less to very unsymmetrical. In the cavity formed 

 of the described parts a very complex copulatory organ, the subanal 

 body (Wood), consisting of penis and variously formed appendages, 

 is enclosed, and these parts are sometimes more or less exposed. 

 Below the hind margin of the tergite, between the side parts the 

 tenth segment, the anal tube, protrudes, it varies to no small degree, 

 being short, papilliform and not or almost not protruding, or it is 

 long, cylindrical and fmger-like (Dohrniphora), or shorter, flat and 

 depressed (Trupheoneura)^ or fmally compressed and more or less 

 high (Aphiochaeta); it generally (or always) consists of a tergite, 

 often divided longitudinally, and a ventrite, which stretches further 

 backwards than the tergite and generally bears at the end two shorter 

 or longer upwards curved hairs. In Hypocera, except citreiformis, and 

 Conicera there is the difference, that the opening for the anal tube 



