BY FREDERICK A. A. SKUSE. 79 



** Second submarginal aiid discal cells not in contact, 

 separated by small cross-vein. 



^ antennae : first flagellar joint short, without a 

 branch ; second to eighth with a single long branch 

 on the outer side ; eighth joint not much longer than 

 the preceding ones ; three cylindrical terminal joints. 



Platyphasia, Sk. 

 b. (J antennae with short branches. 



Div. 1. ^ and ^ antenn?e : first flagellar joint 

 tolerably long, thickened at apex, or even with a 

 short branch beneath ; second to seventh with a short 

 branch on each side at the base ; in ^ with four, in 

 5 with six long cylindrical terminal joints. 



Div. 2. 5 antennae : first flagellar joint short, with 

 a short branch beneath ; second to seventh or ninth 

 with a short branch on each side at the base ; four or 

 six short cylindrical terminal joints. Plusioniyia, Sk. 



B, Antennae simple. 



1. Antennce 11-jointed in ^, IS-jointed in <^. 



(J antenna? about length of entire body, densely 

 beset with short erect hairs ; 9 antennae about length 

 of thorax, Habromastix, Sk. 



2. AntenncB 13- jointed (? in both sexes). 



Antennse short. Phyinatopsis, Sk. 



II. Distinct nasus to rostrum ; ^ forceps usually of com- 

 plicated STRUCTURE. 



A. Antennae pectinate, 13-jointed, in both sexes; ^ forceps of 

 simple structure. Rostrum prolonged. 



Div. 1. Antennae bipectinate ; first flagellar joint 

 short, without a branch ; second to seventh with a 

 pair of short branches ; four long cylindrical terminal 

 joints. 



