Phoridae. 7.9 



vein I take to be a branch from the ciibital vein, this thiis being 

 forked and two cubital cells being present, or when there is no radial 

 vein there is only one cubital cell; the second thin vein 1 take as the 

 discai vein (Redtenbacher's vein V), the third is the postical vein 

 and the fourth the axillary vein; this latter may be more or less 

 abbreviated or wanting; the anal vein is wanting, sometimes more 

 or less indicated as a concave fold; below the discai vein a concave 

 fold, furcated at the end, is generally seen (representing Redtenbacher's 

 vein VI). As all the thin veins are unbranched there are only two 

 posterior cells, and anal and axillary cells are confluent; there is 

 only one basal cell, the more or less distinct cross-vein closing it 

 apically includes, I think, the middle cross-vein, which should be 

 placed between the in the basal part coalesced cubital and discai 

 veins; otherwise no cross-veins are present. In the descriptions I 

 follow the way used by other authors on the Phorids and designate 

 the veins by their number: the subcostal vein as the first vein, the 

 radial as second, the second thick vein as the third, and the thin 

 veins as fourth, fifth, sixth and seventh. The costa bears two parallel 

 rows of shorter or longer cilia, and just at the base it has one or some 

 longer bristles; in Chaetoneurophora and in species of Hypocera and 

 Triipheoneura the third vein has in the whole length fine bristles or 

 hairs, and it has sometimes a more or less conspicuous bristle at the 

 base. Sometimes the costa is more or less thickened, it may be the 

 case in both sexes, but generally most or only in the female, and 

 the thickening may reach a high degree. In other species the third 

 vein may be specially thickened, and then only in the male or at all 

 events only slightly in the female. Alula is not developed, the margin 

 is here straight and bears a number of stubby bristles; the number 

 of these bristles may be different and is in some genera {Conicera) 

 only one. (Also in the species of f. inst. Aphiochaeta, the number may 

 be different and perhaps give specific characters, but it is difficult to 

 use, as these bristles are easily lost). In rest the wings lie flat over 

 abdomen. The venation of the wing, especially the length of costa 

 and of its divisions and the length of the costal cilia give important 

 characters for the genera as well as especially for the species. Peculiar 

 wing-pores have been mentioned (Felt, lOth State Entom. N. Y. 

 Report) lying near apex of the third vein or stretching more back- 

 wards (Brues); they are, I think, sensory pores belonging to the same 

 category as those described by Mc. Indoo (Journ. of Comp. Neurol. 

 XXIX, 1918). Above, at the base of the wing-root there is a small. 



