80 INSECUTOR INSCITI^E MENSTRUUS 



stripe is apparently undivided, yet there is a trace of the di- 

 vision in the better preserved specimens, and I now think that 

 it is aldrichi, and not a form of hirsuteron as I was at first 

 inclined to consider it. 



Species 13. 



Aedes (Ochlerotatus) gonimus Dyar & Knab. 



A'cdes gonimus Dyar & Knab. Ins. Ins. Mens., v, 165, 1918. 

 Aedes gonimus Dyar, Ins. Ins. Mens., viii, 199, 1920. 



This form is at present known only by females from central 

 Texas. Its exact position, therefore, is doubtful. 



TWO UNDESCRIBED SPECIES OF JAPANESE 

 PTYCHOPTERIDAE 



(Dipt era) 



By CHARLES P. ALEXANDER 



Two species of the genus Ptychoptera Meigen have hitherto 

 been recorded from Japan. It is with pleasure that two addi- 

 tional forms are herewith made known, both from the island 

 of Hokkaido. The material was included in a collection of 

 Japanese Tipuloidea sent to me for naming by Dr. Shiraki, to 

 whom I express my thanks for this and other valuable speci- 

 mens from the Japanese Empire. The types are preserved in 

 the writer's collection, additional material in the possession of 

 Dr. Shiraki. 



Ptychoptera daimic, new species. 



General coloration yellow, mesonotal praescutum with three 

 broad, shiny black stripes ; basal antennal segment yellow ; 

 tarsi dark brown ; wings with a strong yellowish tinge, brown 

 wing-markings very restricted ; lateral lobes of the ninth tergite 

 of the male hypopygium bifid. 



Male. — Length, 10.5 mm. ; wing, 12.3 mm. 



Rostrum and front obscure yellow; palpi yellow, the ter- 

 minal segment dark brown. Antennae with the first scapal 

 segment light yellow ; second scapal segment brown ; flagellum 

 black. Head black. 



