Xo. 64] DIPTERA OF COXXECTICUT : TAXONOMY . 297 



Subfamily Limoniinae 



This vast subfamily includes the majority of all small and 

 medium-sized Tipulidae throug'hout the "World. There are five tribes, 

 four of which are represented in the local fauna. 



Key to Tribes 



1. Eyes hairy; vein Sci very long, Sc-:> lying basad of origin of Rs (Fig 40 



A-J) Pedi'ciini 3ia. 



Ej'cS glabrous; vein .S"ri short or of moderate length, when long (some 

 Eriopterini), Sc- lying distad of origin of Rs; where Sd lies basad of 

 origin of Rs (some Limoniini, Eriopterini), the entire vein Sc is short- 

 ened 2 



2. Free tip of .S"r- often present; veins Rt and R5 fused to margin, only two 



branches of Rs being present (Fig. 34, A, B) ; antennae usually with 14 



(Limoniaria) or 16 segments Limoniini 



Free tip of Sco atrophied ; veins Ri and Rr, separate, the former usually cap- 

 tured by i?2+3 to form a distinct element i?2+3+4 ; usually with three branches 

 of Rs present (exceptions in Atarba, Elcphantomyia, Teucholabis and some 

 Gononiyia, where Ri is captured by 7^2+3 (Figs. 44, P; 47, E, F. G)); 

 antennae usually with 16 segments 3 ^ 



3. Tibial spurs present Hexatomini 3#i 



Tibial spurs lacking Eriopterini ^i^ 



Limoniini 



A considerable tribe, including within our limits, representatives 

 of six subtribes, of which the Limoniaria are most common and well- 

 known. 



Key to Subtribes and Genera 



1. Wings with vein R, lacking (Fig. 38, B, D) 2 



Wings with vein R2 present (Fig. 38, C, E-G) 3 



2. Rostrum short and inconspicuous ; Sd far from tip of 5ci, lying basad of 



the origin of Rs, the latter vein long and straight, miming close to i?i 

 and in direct alignment with R2+3; r-m distinct (Fig. 38, D). (Ellipteraria) 



Elliptera, part 

 Rostrum of moderate length, about equal to or longer than remainder of 

 head ; Sc-2 at tip of Sci, both being about opposite the fork of Rs, the 

 latter vein short, gently arcuated, not in alignment with R2+3; r-m oftftn 

 shortened or obliterated by the approximation of adjoining veins (Fig. 

 38, B). (Heliaria) Melius 



3. Wings with m-cu close to or beyond the fork of M ; if before the distance 



not or scarcely exceeding the length of the vein itself (Figs. 34, A, B; 



38, C, E, F) '^ 



Wings with vi-cii far before level of origin of Rs (Fig. 38, G). ( Ormiar- 

 gaj-ia) Orimarga: Diotrepha 



4. Wings with vein Ro lying far distad, beyond level of outer end of cell 1st M«: 



)ii-eit bevond fork of M : a conspicuous pale fold in distal end of cell 

 Cu. shown in illustration bv a dotted line (Fig. 38, F). (Dirranopty- 



charia) Dicranoptycha 



Wings with R2 in almost transverse alignment with r-m and the basal half 

 of cell 1st M2, at most (some Limonia) opposite the outer end of cell 

 1st M-2 ; iu-cu at or slightly before fork of M ; no fold in cell Cu 5 



5. Wings with Rs long, straight or slightly convex (Fig. 38, C, E) ; antennae 



16-segmented •. " 



Wings with Rs shorter, more concave in outline (Fig. 34, A, B) ; antennae 

 14-segmented (Limoniaria) Limonia 



