136 NEW YORK STATE MUSEUM 



KEY TO SPECIES OF ABLABESMYIA 



(I I>iibiuiu with but four teotli. pl.l'.t. fiy..j. ..L'O. Species from Itliaca, N. Y. 

 iiu Labium witli five teetli 



h Several claws of the posterior feet stouter aud conspicuously darker 

 colored than the others, pi. 19, fig.l4. Antennae over three times as 



long as the mandibles 6. m o n i 1 i s 



bh Claws of posterior feet all the same color 



c Antennae rather short aud stout (pi. 20, tig.l) less than 1.5 times 

 as long as the mandible; sides of abdomen fringed laterally with 



hairs P r o c 1 a d i u s a d u m b r a t u s (q. v.) 



cc Antennae over twice as long as the mandibles 



d Teeth of labium of about equal length ; antennae three times as 



long as the mandible, pi. 20, fig.G 4. c a r n e a 



dd Not as above 



f Mandible stout at base with distinct tooth near apex ; basal 

 joint of antenna about two thirds of total length, pl.l9, figs. IG 



and 17 22. f a s t u o s a n. sp. 



ec Antenna with its basal joint over three fourths the total length, 

 pi. 19, fig.l IG. f 1 a V i f r o n s n. sp. 



PiilHie 

 a Swimming paddle rounded, not sharply notched at apex 



h Trumpet rather elongate, over four times as long as wide ; swiunning 

 paddle as shown in pl.20, fig.4 



P r o c 1 a d i u s a d u m b r a t u s (q. v. ) 

 hh Truuipet short (pi. 19, fig.3) ; swimming paddle as shown on pi. 19, 



fig.-l P r c 1 a d i u s p i n g u i s (q. v. ) 



aa Swimming paddle with two pointed lobes 



h Thoracic respiratory organ (trumpet) egg-shaped, with very small 



aperture, pi. 19, fig.13 G. m o n i 1 i s 



hh P>reathing organ funnel or club-shaped 



c Breathing organ club-shaped, pi. 19, fig.2. .IG. flavifrons n. sp. 

 cc Breathing organ not of this type 



d Swimming paddle rather broad, but little longer than wide, pi. 19, 



fig.G. Trumpet as shown in fig.7 10. d y a r i 



dd Swimming paddles quite pointed 



c Paddle and breathing trunqiet as shown on pi. 19, figs. IS 



and 19 22. f a s t u o s a 



c'e As shown on pl.20, figs. 7 and 8 4. c a r n e a 



Iinctf/iiics 

 a Wings clouded (banded or spotted) 

 b IjCgs nearly miiform in color 



c Wings uniformly spotted with fuscous ; fuscous species ; the thorax 

 with three dusky stripes; legs yellow: length 4.5mm.; female. 



(= ? d e c e d e n s Walk. ) 1. pictipennis 



cc Smaller paler species ; the wings with few large bars or spots 



d The first fascia of the wing lies distad of the crossvein ; length 

 21^ to 4 nun 2. b i f a s c i a t a 



