22 Pipunculidae. 



shorter than the next. The first group again divides into three smaller 

 groups: 1, the species with a quite dull abdomen in both sexes; this 

 group comprises the species 1 to 8; 2, the species with a more or less 

 shining abdomen, with thorax and scutellum relatively densely hairy 

 all over and with femora, especially middle femora, obviously ciliate 

 behind; this group comprises the species 9 to 12; 3, the species with a 

 considerably shining abdomen, thorax and scutellum nearly bare 

 with hairs only as dorsocentral rows and at humeri, and with the fe- 

 mora with only a faint (or no) pubescence behind; this group comprises 

 the species 13 to 16. The second larger group, without stigma, divides 

 into two smaller groups: 4, the species with the middle cross-vein 

 situated much before the middle of the discai cell, comprising the 

 species 17 to 22 and 5, the species with the middle cross-vein at or 

 beyond the middle of the discai cell, comprising the species 23 to 25. 

 It will be seen, that only group 2 has thorax and scutellum hairy all 

 over, all the other groups have hairs only as dorsocentral rows and at 

 the humeri; further only group 2 and 3 have a distinct ciliation behind 

 the femora, especially middle femora, this ciliation is obvious in group 

 2, faint in group 3 and here it is wanting in zer mattens is; all the other 

 groups have no such ciliation or pubescence. Perkins remarks that 

 for the Australian and Hawaiian species only the division into the 

 stigmated and non-stigmated groups holds good, while the other 

 groups are not satisfactory for these species; the groups, he uses, 

 with characters from the various pointing or rostration of third 

 antennal joint and from the hairs at the sides of first abdominal 

 segment being bristly or not, would, on the other hånd, not be 

 practicable for our species, as these characters are here very 

 graduated. 



1, P. melanostolus Beck. 



1897. Beck. Berl. Ent. Zeitschr. XLII, 40, 5 et 1900, XLV, 220, 5 et 1921. 

 Wien. Ent. Zeitg. XXXVIII, 123. - 1910. Kertész, Cat. Dipt. VII, 377 {Do- 



rylas). 



Male. Frons and epistoma shining whitish. Occiput greyish, 

 brown above. Antennæ black, third joint oval, pointed but not 

 distinctly rostrate, second joint with conspicuous hairs above and 

 longer below. Thorax brown, dull, with an indication of three less 

 dull stripes; on the sides behind the humeri it is greyish; the disc has 

 very sparse, short brownish hairs, only present as dorsocentral rows, 



