THE JUMPING PLANT-LICE OR PSYLLIDiE OF THE NEW WORLD. 93 



thirds as long as vertex, acute, divergent, very slightly pubescent. 

 Antennae slightly over one and one-fourth times width of head, slender. 



Thorax arched rather strongly; pronotum short. Legs slender; 

 hind tibiae with two very small spines at apex inside and one outside. 

 Wings small, transparent, about three times as long as broad, sub- 

 acute at apex. 



Genitalia. — Female. — Genital segment large at base, subglobose, 

 each valve produced at end into a short, slender, acutely pointed 

 process. 



Described from one female from San Marcos, Nicaragua (C. F. 

 Baker). 



Type in author's collection. 



The genitalia are very easily recognizable in this species. 



TRIOZA STYLIFERA Patch. 



Figs. 139, 414. 



Trioza stylifera Patch '12b : 229. 



Width of head 0.61 mm; length of forewing 2.4 to 2.6. General 

 color brownish; antennae pale brown, dark at tip. 



The only specimen before me of this species is a balsam mount con- 

 taining the head, both wings, and the male cauda of one specimen, 

 consequently not all the usual characters can be given. 



Vertex more than haK as long as broad, somewhat emarginate in 

 front at median line; genal cones scarcely two-thirds as long as 

 vertex, rather strongly divergent, acute at apex, slightly pubescent. 

 Antennae about one and a half times as long as width of head. Because 

 of its resemblance to certain other species I have inferred that the 

 hind tibiae have two spines at apex on inner side (an uncertain infer- 

 ence), and have placed it in that category in the synoptic tables. 

 Wings yellowdsh, broadly rounded at apex, with a slight degree of 

 angulation at tip of medial vein; Rs short and straight; venation 

 suggesting alhifrons somewhat. 



Genitalia. — Male. — Anal valve moderately large, produced caudad 

 a little (in lateral aspect) ; forceps nearly as long as anal valve, nar- 

 rowed midway, then broadened and thinner at apex and forming a 

 hood. Female. — Genital segment "relatively long and acutely 

 pointed; the upper plate extends a bit beyond the ovipositor and 

 is slender at tip" (Patch). 



Described from one male (paratype?) mounted in balsam (with 

 thorax and legs wanting), kindly loaned to me by Miss Patch; col- 

 lected at Brockville, Ontario (W. Metcalfe), October, 1903. 



TRI02A AYLMERl^S; Paich. 



Trioza aylmerise Patch ' 12b : 225. 



Two balsam mounts of this species containing two heads, four wings 

 and a male and female cauda have been loaned to me by Miss Patch. 

 As in the case of T. stylifera, the inference that the hind tibiae possess 



