INSECUTOR INSCITI^ MENSTRUUS 111 



THE BLEPHAROCERID GENUS BIBIOCEPHALA 

 OSTEN SACKEN IN JAPAN 



(Dipt era) 



By CHARLES P. ALEXANDER 



The genus of net-winged midges Bibiocephala Osten Sacken 

 has hitherto been represented only by four described and an 

 additional unnamed species, all from western North America 

 where they constitute the most important elements of the 

 Blepharocerid fauna. It was with more than usual interest, 

 therefore, that I found an undescribed species of the genus 

 among some crane-fly material from Japan, kindly sent to me 

 for naming by the collector, Dr. K. Takeuchi, to whom I am 

 greatly indebted for many favors in the past. The unique type 

 of the new species is preserved in the writer's collection. 



Bibiocephala japonica, new species. 



Male. — Length, 5.5 mm. ; wing, 7.3 mm. 



Mouthparts brown. Antennae dark brown, the flagellar seg- 

 ments beyond the base of the first conspicuously incrassated. 

 J lead broad, light gray pruinose. 



Mesonotum dull gray, the praescutum with three ill-defined 

 brown stripes, the median stripe split anteriorly by a capillary 

 pale line, behind suflfusing the median area of the scutum ; 

 scutal lobes brownish ; scutellum light gray. Pleura and 

 sternum clear blue-gray, the latter more yellowish medially. 

 Halteres yellow, the knobs faintly darkened. Legs with the 

 coxae and trochanters yellow ; femora yellow, the tips con- 

 spicuously dark brown, on the fore legs including about the 

 distal half, on the elongate posterior femora including only the 

 relatively narrow apices ; tibiae dark brown, the bases a little 

 paler ; tarsi black. Wings hyaline ; veins dark brown ; a con- 

 spicuous thickening at the anal angle of the wing. Venation : 

 i?2 sinuous, shorter than Rs; i? 3 -f- 4 -]-.-, in alignment with Rs 

 and a little shorter than it ; veins R. and R^-\-- divergent 

 apically. 



