AMERICAN DIPTERA. 35] 



brown, anterior ones lighter, all delicately pilose, tibise, especially on the exterior 

 margin, densely short ciliate, posterior tibial spin- long. 



Female. Resembles the male, but the abdomen is shorter and stouter. 



Habitat, Greenland, west coast, as far north as Lat. 69°. 



I have not seen this species, but have inserted it in the table from 

 the description, which unfortunately omits the important details of 

 the chsetotaxy of the thorax and legs. 



DOKKIPHOK \ Dahl. 



Dahl, SB. d. naturf. Freunde. 1898, No. 10, p. 188. 



Becker. Monog. Phoridse, p. 84. (1901.) 

 Front with three transverse rows of four bristles each and two anterior recli- 

 nate bristles. Ocelli present, third joint of antennae with a dorsal arista, third 

 vein forked, mediastinal vein obsolete, costa very finely ciliated. Le«s hristly, 

 pulvilli and empodium wanting or much reduced. Front tibise with a row of 

 four bristles on the anterior side ; middle tibiae with a pair of bristles near the 

 base and a third just before the apex, besides the tibial spurs. Hind tibia' some- 

 what widened, ciliated with fine bristles. Proboscis of the female thin and 

 greatly elongated, normal in the male. 



Represented by a single species from the Bismarck Archipelago, 

 D. dohrni Dahl. 



The close resemblance which this species shows to the American 

 P. incisuralis Lw. and P. divaricata and the chsetotaxy of the front 

 legs is very striking, the present genus being separable from these 

 two Phofas only by the weakened mediastinal vein, differently shaped 

 anal angle of the wing and long proboscis of the female. I doubt, 

 therefore, if it really represents a valid genus. Dahl has mentioned 

 the relation between Dorniphora and Phora incisuralis, and sug- 

 gested that possibly the latter has an elongated proboscis in the 

 female. The proboscis in this sex is, however, perfectly normal. 



HYPOCERA Lioy. 



Lioy, Atti. Inst. Venet., 1864, 78. 



Lioy ( Gymnoptera) , 1. c, 79. 



Becker, 1901, Monog. Phoridse (Phora). 

 Anterior frontal bristles reclinate; frontal bristles twelve or fourteen in num- 

 ber, arranged as in Phora. When there are only twelve, either the two anterior 

 ones or the middle two otf the next row above maybe wanting. Third longi- 

 tudinal vein simple, not furcate, often separated or imperfectly fused with the 

 costal vein at the tip. Antenna- variable, usually ovate or oval, with a dorsal 

 arista, but sometimes they are elongated and drawn out into a point, and bear a 

 sub-apical arista. Front sometimes with an ocellar tubercle or with a median 

 groove. Costal vein ciliated with bristles; mediastinal vein distinct, seventh 



TRANS. AM. KNT. SOC. XXIX. NOVEMBER, 1903 



