340 THE CANADIAN ENTOMOLOGIST 



transverse, 2 is a round, disk-like plate, the petiole is very short, 

 subobsolete, while the coarse, isolated ruga? on ihc propodeuni are 

 entirely different. Differs from piercei in the colour of the legs, 

 the venation is longer in americana, the size much greater, pro- 

 podeuni different and so on. Scutellum with a rimmed apex 

 and an obtuse cross-ridge before the apex. Segment 5 of abdomen 

 occupying over half the surface, the abdomen densely scaly except 

 segments 2-3. Propodeum w'th a pair of coarse, median rugio 

 which are a little separated at base and parallel there for a short 

 distance (joined by a cross-ruga a short distance out), then widely 

 diverging to rim disto-laterad (straight) then aliruptly looped 

 up toward the spiracle forming a large semicircle; from the point 

 of change to this loop, a straight, short ruga runs to the apex at 

 the side of the neck (and between the two, one on each side, of 

 these, are about three straight ruga^; a V-shaped ruga runs cephalad 

 from the apex of the loop). Propodeum densely scaly, punctate. 

 Femora darker, reddish toward base. Club 3-jointed ; funicle 1 

 somewhat longer than wide, 2, quadrate; ring-joint 1, ciuadrate, 

 the others widcM-. Pedicel slightly longer than funicle 1. 



Described from three females in the collection of the U. S. 

 National Museum labelled "5140^ 9-7-91 ". U. S. 



7>^f5— Catalogue No. 203.23, V . S. X. M.. the above speci- 

 mens on tags and a slide bearing a caudal leg, a fore wing and an 

 antenna. 



Rileya hegeli, new species. 



Female — Length 1.00 mm. 



Golden yellow, the wings hyalin?, the venation yellow, the 

 following black markings: Pedicel above at base, distal half 

 of scape above, flagellum (brown), scutum (except lateral margins 

 except distad), pronotum distad acrcss meson for a width equal 

 to the black of the scutum, upper centre of occiput, apex of ovi- 

 positor, scutellum except lateral and distal margins and the meson 

 of the abdomen broadly from base to beyond middle of segment 5. 

 Postmarginal vein nearly as lon^; as the marginal, over twice the 

 length of the stigmal. Abdomen as in cecidomyicE but segment 

 4 transverse-linear, 5 occupying three-fourths of the surface, 

 the petiole very short. Propodeum with a cross-carina between 

 which run longitiidinal ruga^ from base and from apex. Ring-joints 



