410 CONNECTICUT GEOL. AND NAT. HIST. SURVEY [BuU. 



hj^popygium is stated to project acutely. The other genitalic char- 

 acters described seem to be more apjiarent than real. (June. Julv) 

 Pa. 



Pilaria Sintenis 



1888. Pilar'm Sintenis; Sitzber. Nat.— (ies. Dorpat. 8:398. 

 1919, EuJimnopkila Alexander; Cornell Univ., A<rr. Expt. Sta.. mem. 

 25:917. 



The genus FUar'ia includes a small number of local species that 

 present a distinctive appearance as a group, yet are rather difficult of 

 specific separation. The essential features of venation lie in the rela- 

 tively short SiC^ which ends at from two-thirds to beyond four-fifths 

 the length of Us; the very long /?«, which is in alignment with ^2+3+4 

 and usually also with i?4 ; the position of R>, at or close to the fork of 

 ^2+3+4, the feature varying somewhat in all species, where the ele- 

 ment may lie before, opposite or beyond this fork in different speci- 

 mens; the usually long fusion of -ffi + 2, shortest in species such as stan- 

 woodae; and the transverse alignment of the three elements constitut- 

 ing the anterior cord (Fig, 44, G, H). In the present fauna, there 

 occur a few species with elongate antennae in the male, together with 

 others having the organ short in both sexes, the latter group having 

 unusually long conspicuous verticils on all flagellar segments, the for- 

 mer group with these verticils in male becoming long and conspicuous 

 on the outer segments. Likewise there occur species having cell Mx 

 present, wdiile a second group of forms have lost the- cell by the fusion 

 of adjoining veins. The adults of oshor-ni, staniroodae and vermon- 

 tana are characteristic inhabitants of bogs; quadrata and recondita of 

 helophytic associations; the other species in rank shaded situations, 

 usually near streams. The immature stages are spent in rich organic 

 earth. As was done with Pseudoliinnophila^ Edwards (1938) has 

 placed this group as a subgenus of Limnophila Macquart. In this 

 arrangement I cannot agree, since the immature stages of both groups 

 differ widely from the condition found in LitnnophiJa. 



Key to Species 



1. Wings with cell NU present ( Fig. 44, H) 2 



Wings with cell Ah lacking ( Fig. 44, G) 6 



2. Thoracic dorsum chietly dark brown to black ; wings narrow, with a long 



basal petiole, the stigma usually very distinct ; antennae { $ ) elongate. 



exceeding one-half the length of body tenuipes 



Th.oracic dorsum reddish brown to yellowish brown ; wings broader, with 

 a shorter basal petiole and with stigma pale brown to virtually lacking : 

 antennae short in both sexes, except in vermoutafia where tlic thoracic 

 dorsum is polished reddish yellow 3 



3. Mesonotum polished reddish yellow to reddish brown 4 



Mesonotum opaque yellow to brownish yellow (iinbecilla) 5 



4. Wings strongly tinged with brown ; head brown ; antennae short in both 



sexes recondita 



Wings only slightly inf umed ; head blackish, pruinose ; antennae ( S ) elon- 

 gate, if bent backward extending to beyond base of abdomen vermontana 



5. Size larger (wing, S, over 7 mm.); head light gray imbecilla imbecilla 



Size small (wing, $, about 6-6.5 mm.) ; head yellowish. . imbecilla illinoiensis 



