1918] Weiss and Dickerson — Notes on Trioza Alacris 63 



Antennae arising in front of eyes, apparently five jointed, length, 

 four-fifths the width of the head; two basal segments covered by 

 dorsal expansion of head. Antennae transversely ridged; apical 

 segment slightly club shaped, tapering to point and bearing two 

 spines at tip and one on lateral margin. Legs three jointed; basal 

 segment broadest, sides convex especially outer surface; second 

 segment slightly longer than basal segment, sides parallel. Apical 

 segment one-third length of second, slightly narrower; outer 

 surface broadly rounded to inner forming tip terminated by a pair 

 of hooks. Second and third segments bear a few scattered hairs. 

 Basal sheath of rostrum extending to just beyond bases of first pair 

 of legs. 



Adult: Trioza alacris Flor, syn. Trioza laiiri Targ. The follow- 

 ing description is by Crawford (Bull. 85, U. S. N. M.). The 

 original description by G. Flor appeared in "Zur Kenntniss der 

 Rhynchoten Beschreibung neuer Arten der Familie Psyllodea 

 Burm., Moskau, 1861." "Length of body 1.9 mm., length of fore- 

 wing 3.2, width of head 0.71. General color greenish yellow to 

 light brown; dorsum in darker individuals more or less striped and 

 streaked with brown; abdomen often brown; antennae black at 

 tip. 



"Head nearly as broad as thorax, not strongly deflexed; vertex 

 more than half as long as broad, emarginate in front at median line, 

 with a prominent sulcate impression on each side of median line 

 and parallel to it; genal cones scarcely two-thirds as long as vertex, 

 divergent, subacute, pubescent, not much depressed from plane of 

 vertex. Antennae about one and one-third times width of head, 

 slender. Thorax not broad, well arched, punctate; pronotum 

 moderately long, not strongly depressed; praescutum rather large. 

 Legs slender; hind tibiae with two black spines at apex on inside 

 and one outside. Wings long, slender, transparent, fully three 

 times as long as broad, subacute at apex; Rs short. 



" Genitalia — male — Anal valve a little longer than forceps, hind 

 margin arcuate, with long pubescence; forceps rather stout, sides 

 almost parallel (from sides), terminating in a subacute, black point 

 at apex. 



"Female — Genital segment nearly as long as rest of abdomen, 

 acute at apex, valves subsequal in length. " 



