20 INSECUTOR INSCITI/E MENSTRUUS 



surface of the fore femur of three subapical, triangular teeth, between 

 which, when the leg is flexed, fits a similar tibial tooth — a remarkable 

 structure, known before only in the rather distaintly related genus Hop- 

 landrothrips. 



Trichothrips karnyi, new species (PI. I, figs. I -3). 



FemzJe {forma macroptera) : Length about 2.2 mm. ; width of pro- 

 thorax about 0.43 mm. Color nearly uniform light blackish brown, 

 pterothorax and both ends of tibiae slightly paler ; fore tibiae, aU tarsi, 

 articulations of legs, and bases of intermediate antennal segments yellow 

 or yellowish. 



Head distinctly longer than wide, rounded in front, noticeably con- 

 stricted at its insertion into prothorax ; dorsal and lateral surfaces with 

 anastomozing lines and severeJ short, stout, conspicuous spines ; postoculcir 

 bristles about half as long as head, pointed. Eyes about one-third as 

 long as head, their axis of greatest dorsal length neeurly coinciding with a 

 line drawn from base of first antennal segment to anterior end of gena. 

 Ocelli nearly equidistant, moderately large ; posterior pziir slightly in front 

 of centers of eyes ; anterior ocellus directed forward. Antennae slightly 

 less than twice as long as head, 8-segmented ; segments 3-7 subclavate, 

 pedicellate, 3 about 2.5 times as long as greatest width; 8 lanceolate, 

 subpedicellate ; color blackish brown, except apex of 2, basal three-fifths 

 of 3, basal two-fifths of 4, basal third of 5, and pedicel of 6, which are 

 usually pale yellow. Mouth cone very slightly longer than wide, the 

 apical half almost perfectly semicircular in form ; maxillary and labial 

 palpi 2-segmented, basal segments very short. 



Prothorax trapezoidal, about two-thirds as long as head and (inclusive 

 of coxae) slightly more than twice as wide as long ; all usual bristles pres- 

 ent, pointed ; anterior marginals minute, midlaterals and the two pairs at 

 the posterior angles subequal, much the longest ; coxal bristles four or five 

 in number, the anterior about twice as long as the others, equal in length 

 to anterior angulars. Pterothorcix distinctly wider than prothorax, sides 

 straight and converging posteriorly. Wings lightly washed with brown, 

 the hind pmr with a median brown line ; subapical fringe of fore v^ongs 

 with about 1 interlocated hairs on posterior margin. Legs rather stout ; 

 fore femora slightly swollen ; fore tarsi with a stout acute tooth usually 

 about as long as width of tarsus. 



Abdomen large and heavy, slightly wider them pterothorax, broadly 



