BY FREDERICK A. A. SKUSE. 81 



Rostrum as long as head. Palpi with terminal 

 joint long, flagelliform. ^ forceps not incrassate, 

 short. Last section of second longitudinal vein 

 arcuate. Holorusia, Loew. 



Rostrum long. Palpi with terminal joint long, 

 flagelliform. ^ forceps moderately incrassate. 



Tipula, Linn. 



Rostrum short. Palpi with terminal joint long, 

 flagelliform. Antennae 13- to 19-jointed. Second 

 posterior cell usually sessile. Body-colour usually 

 yellow, with three black stripes in the thorax. ^ 

 forceps moderately incrassate. Pachyrrhina, Macq. 

 b. Genitalia not protruding in either sex. 



(J antennse sometimes very long and filiform, 

 often as short as in ^. Front rather broad, with a 

 tubercle above the antennae (more prominent in 

 ^ than in 9)- Body short. llacromastix, O.-Sack. 



I. No DISTINCT NASUS TO ROSTRUM ; ^ FORCEPS OP SIMPLE 

 STRUCTURE. 



A. Antennae pectinate, with a variable number of joints. 



1. Antennoi IS-jointedin ^, 15-jointed in 9. 



a. (J antennae with long branches. 



* Second suhmarginal and discal cells in cotnplete con- 

 tact. 



Genus 5. Ptilogyna, Westwood. 



Ptiloyyna, Westw., Lond. and Edin. Phil. INlag. VI. p. 280, 

 1835 ; Zool. Journ. V. No. 20, p. 448, 1835 ; Macquart, Dipt. 

 Exot. I. p. 45, 1838; Westw., Trans. Ent. Soc. Lond. 1881, 

 p. 381 ; O.- Sacken, Studies, L p. 175, 1886. 



First longitudinal vein joining before, at, or a little beyond 



origin of anterior branch of second longitudinal vein ; second sub- 

 6 



