14 PROCEEDINGS OF THE NATIONAL. MUSEUM vol. ea 



Subfamily TiPULiNAE 

 Tribe TIPUIINI 



Genus DICTENIDIA Brulle 



1833. Dictenidia Brulle, Ann. Soc. Ent. France, vol. 2, pp. 401-402. 



DICTENIDIA BIMACULATA (Linnaeus) 



1761. Tipula bimaculata Linnaeus, Fauna Suec, ed. 2, p. 433. 



One male, Kongaus, Siberia, August 1923 (T. D. A. Cockerell) ; a 

 pair, Kudia River, Amagu, Siberia, July 1923 (T. D. A. Cockerell). 

 A critical comparison with European specimens reveals no differences 

 between these flies. 



Genus TIPULA Linnaeus 



1758. Tipula Linnaeus, Syst. Natur., ed. 10, p. 585. 



TIPULA COCKERELLIANA, new species 



Allied to T. fulvipennis de Gecr, T. sMrakii Edwards, and similar 

 species; general coloration grayish yellow, the praescutum with four 

 brown stripes; wings with a strong yellowish brown suffusion, the 

 obliterative band before the cord very broad and conspicuous, 

 cream-colored. 



Female. — Length, 28 mm.; wing, 23 mm. 



Frontal prolongation of head relatively elongate, brown; nasus con- 

 spicuous; palpi dark brown. Antennae with the scapal segments 

 brownish yellow; flagellar segments feebly bicolorous, the basal 

 enlargement darker brown than the ground-color; verticils long and 

 conspicuous. Head dark brown, gray pruinose. 



Mesonotal praescutum grayish yellow with four brown stripes, the 

 intermediate pair narrowly separated from one another by a gray 

 line; scutal lobes dark brown, each with two dark gray markings; 

 scutellum brownish yellow, the center of the disk grayish brown; 

 postnotum dark but heavily yellowish pollinose to virtually obliter- 

 ate the ground-color. Pleura yellowish testaceous, the posterior 

 margins of the postnotal pleurotergite weakly infuscated. Halteres 

 brown, the bases of the stems and the apices of the knobs paler. 

 Legs with the coxae and the trochanters yellow; femora yellow, the 

 tips broadly and conspicuously dark browm, the tibial apices more 

 narrowly infuscated ; tarsal segments one to thi-ee brownish yellow, 

 the tips of the individual segments narrowly darkened, the terminal 

 tarsal segments uniformly infuscated. Wings with a strong yellow- 

 ish brown suffusion, the stigma darker; cells beyond the cord some- 

 what darker than the basal cells; a brown cloud near mid-length of 

 cell Cu, preceded by a clearer yellow area, the latter continued into 

 cell M; a very broad and conspicuous creamy obliterative mark 



