22,5 Alexander: Crane Flies from Formosa and Luzon 469 



Libnotes subopaca is most closely related to L. opaca Bezzi, 

 of Luzon. 

 Dicranomyia tattakse sp. nov. 



General coloration gray, the mesonotal prsescutum with three 

 more or less confluent dark brown stripes ; pleura with a narrow 

 black longitudinal stripe; wings faintly tinged with gray; 

 brown spots at arculus, at origin of Rs and at the stigma; 

 veins beyond cell 1st M 2 short. 



Male. — Length, about 5 millimeters; wing, 7.2. Rostrum and 

 palpi brownish black. Antenna? dark brownish black through- 

 out. Head light gray. 



Mesonotal prsescutum yellowish gray with three dark brown 

 stripes, the anterior ends of the lateral stripes confluent with the 

 median stripe, restricting the interspaces to linear stripes before 

 the suture ; humeral region clearer gray ; scutum gray, the lobes 

 dark brown ; remainder of the mesonotum dark brown, sparsely 

 pruinose. Pleura dark gray with a very narrow but conspicuous 

 black longitudinal stripe extending from above the fore coxa 

 to the base of the abdomen, passing immediately ventrad of 

 the root of the halteres. Halteres obscure yellow, the knobs 

 a little darker. Legs with the coxa* dark, sparsely pruinose; 

 trochanters brown ; femora brown, the extreme bases pale, the 

 tips broadly blackened, the extreme apices indistinctly pale; 

 tibiae and metatarsi brown, the tips blackened; remainder of 

 the tarsi black. Wings with a faint gray tinge, sparsely spot- 

 ted with brown ; a conspicuous spot at arculus ; a second spot at 

 origin of Rs; stigma small, subcircular in outline; narrow 

 brown seams along the cord and outer end of cell 1st M 2 ; anal 

 angle faintly infuscated; veins brown, those in the costal 

 region a little more yellowish. Venation : Sc short, Sc t ending 

 opposite the origin of Rs, Sc 2 at its tip; Rs feebly angulate at 

 origin, not quite twice the deflection of R 4+5 ; cell 1st M 2 long 

 and narrow, longer than any of the veins issuing from it, more 

 than twice the distal section of Cu x ; basal deflection of Cu, 

 before the fork of M, the distance a little longer than r-m. 



Abdomen dark brown. Male hypopygium with the ventral 

 pleural appendage large, produced into a conspicuous rostrum 

 that bears two spines; mesal face of pleurite produced into a 

 conical lobe, the mesal face and apex of which is setiferous. 



Habitat. — Formosa. 



Holotype, male, Tattaka, altitude about 7,400 feet (about 

 2,250 meters), August 16, 1921 (T. Esaki). 



