akt4 crane flies FROM SIBERIA ALEXANDER 11 



Tribe ERIOPTERINI 



Genus MOLOPHILUS Curtis 



1833. Molophilus Curtis, Brit. Ent., p. 444. 



MOLOPHILUS LOBIFERUS, new species 



General coloration brown, including the thoracic pleura; halteres 

 pale, the knobs yellowish; male hypopygiura with each basistyle 

 produced mesad and caudad into a fleshy setiferous lobe; apex of 

 basistyle and dististyles totalling four chitinized arms. 



Male. — Length about 3.6 mm.; wing, 4.5 mm. 



Female. — Length about 4 mm.; wing, 5 mm. 



Rostrum and palpi brown. Antennae of moderate length in the 

 female, broken in the unique male, pale brown, the basal segments 

 a little brighter. Head dark gray. 



Mesonotum dark brown, the lateral margins of the praescutum a 

 little paler. Pleura dark brown. Haltci-es pale, the knobs yellow- 

 ish. Legs with the coxae and trochanters yellowish testaceous; 

 remainder of legs obscure yellow, the tarsi passing into brown. 

 Wings with a pale yellowish tinge, the veins pale brown. Venation: 

 i?4+5 about twice the basal section of vein Rr, alone; basal deflection 

 of Cuj^ less than its length beyond the fork M; vein 3nd A ending 

 about opposite one-fourth the petiole of cell J/3. 



Abdomen brown, the sternites and hypopygium a little paler. 

 Male hypop3^gium (fig. 4) with the basistyles stout, approximated 

 on the ventral face, each here produced caudad and slightly mesad 

 into a slender fleshy lobe that is provided with stout setae. Apex 

 of basistyle produced into two long, powerful arms, the outer or 

 lateral one directed caudad, before midlength bent strongly mesad 

 into a long, nearly straight black spine; inner or mesal arm con- 

 nected basally with the outer, shorter, heavily blackened, feebly 

 sinuous. A third chitinized arm is longer than any of the others, 

 weakly expanded on the distal half and here provided with small 

 subappressed teeth, the apex acute. Another dististyle is present 

 and chitinized, but in the unique type has been broken beyond the 

 base which is dilated, thence narrowed and blackened; this append- 

 age is not shown in the figure. Aedeagus long and slender, pale. 



Described from a pair taken at Olga, Siberia, July 1923 (T. D. A. 

 Cockerell) . 



Tifpe.—UaXe, Cat. No. 28363, U.S.N.M. 



Genus ERIOPTERA Meigen 



1803. Erioptera Meigen, llliger's Mag., vol. 2, p. 2G2. 



ERIOPTERA (ERIOPTERA) FUSCOHALTERATA, new species 



General coloration pale reddish and yellow; halteres pale, the 

 knobs conspicuously brownish black; legs yellow, the terminal tarsal 



