from the Philippine Islands. 103 



Damalis. 



The characters of this geuus have been enumerated by Dr. Loew 

 (Siidafr. Dipt. 107) and v. d. Wulp (Tijdschr. XIX, 140). I have five 

 asiatic species before me; four from the Philippines, and one from 

 Ceylon {D. fulvipes VVestw.). These species seem to differ from the 

 african ones by their mystax, which consists of only four bristles, placed 

 in a row above the oral margin, while in the african species the mystax 

 seems to be more bushy and to extend farther up towards the antennae. 

 However D. Felderi Schin. from Ceylon, has the mystax more like 

 the african species; (I judge of all these species merely from the des- 

 criptions). The facial swelling in all my species is very weak; it seems 

 to be more prominent in the african ones. In D. fulvipes Westw. 

 the contact between the fifth post. c. and the discal is merely punctiform 

 (in other words, the fourth posterior cell is not petiolate); in the species 

 from the Philippines that contact is moderately broad, (that is, the 

 fourth post. c. has a petiole which is shorter than the posterior cross- 

 vein). Mr. V. d. Wulp described D. marginata, which has the an- 

 terior crossvein opposite the middle of the discal cell, and in which 

 the veins, issuing from the discal cell (externomedial veins) are straight 

 or nearly so. Usually however the anterior crossvein in Damalis is 

 beyond the middle of the discal cell, and the externomedial veins, es- 

 pecially the first, are more or less arcuated. ') The four species from 

 the Philippines are more slender than D. fulvipes; the abdomen is 

 flatter; the hind femora less stout; the same diff'erences seem to occur 

 among the african species (comp. Loew, 1. c. Ill, note to D. capensis). 

 The majority of the asiatic species have the hind femora armed with 

 strong spines on the underside; however, D. nigella v. d. W., which 

 I believe to recognize in one of my species from the Philippines, is 

 without them; the absence of spines seems to occur more often among 

 the african species. All my species have, on the underside of the 

 middle tibiae, several (about four?) long, erect hairs, diminishing in 

 length from the proximal to the distal end of the tibia. None of the 

 species before me have, at the end of the middle tibiae, the prolon- 

 gation (,,Zapfenartiger Fortsatz'") sometimes existing there; comp. for 

 instance the descriptions of D. Felderi Schin. from Ceylon, and of 

 D. speciosa Lw. from S. -Africa. 



I give below a synopsis of all the described asiatic species in- 

 cluding my own; it must be borne in mind that it was drawn up 

 merely from the descriptions of most of the species, and may therefore 

 contain inaccuracies. 



') Macqiiart figures the wing of D. tibialis as having the cross- 

 vein opposite the middle of the discal cell; but is that figure correct? 



