INSECUTOR INSCITI^E MENSTRUUS 11 



Chirothrips insolitus, new species. (PI. II, figs. 1 and 2.) 



Female (macropterous). — Length about 1.1 mm. Color 

 quite uniform dark blackish brown, with pterothorax tinged 

 with orange, tarsi yellowish. 



Head about 0.9 as long as wide and O.G as long as prothorax, 

 broadest across eyes, occiput with about three anastomozing 

 lines ; cheeks straight and parallel, about one-sixth as long as 

 head or about one-third as long as eyes ; front produced be- 

 yond eyes, its sides slightly converging anteriorly, about two- 

 thirds the length of cheek ; three pairs of minute bristles near 

 base of antennae, in addition to a much longer pair near eyes in 

 front of anterior ocellus ; three additional pairs of minute 

 bristles at posterior margin of eyes on dorsal surface. Eyes 

 about 0.6 as long as head. Ocelli approximate, equal in size, 

 the posterior pair slightly more widely separated. Antennae 

 nearly 1.9 times as long as head, nearly uniform blackish brown, 

 apex of 2 and base of 3 yellowish ; segment 2 about 0.8 as 

 long as greatest width, trapezoidal, with sides very slightly 

 convex, the outer surface meeting the apical in an acute angle 

 which does not bear a terminal spine; 3 only 0.9 as long as 

 greatest width, with slender pedicel ; 4 and 5 slightly wider than 

 long, very briefly pedicellate ; 6 about twice as long as wide, 

 broadest at about basal three-tenths, thence tapering evenly 

 to apex; 7 and 8 equal in length, each fully two-fifths as long 

 as 6, 8 nearly four times as long as wide. 



Prothorax about one and two-thirds times as long as head 

 and about 1.4 times as wide as long ; pronotum sparsely spinose, 

 with rather close, distinct, anastomozing striae ; the two pairs 

 of bristles at posterior angles unusually long for the genus, 

 fully one-third as long as pronotum. Pterothorax nearly 1.2 

 times as wide as prothorax; mesoscutum with close, anasto- 

 mozing striae in posterior half, the anterior half with the striae 

 broken up into chitinous arcs. Wings of fore pair about six- 

 teen times as long as width at middle, slightly curved through- 

 out, blackish brown, paler near base ; costa, anterior vein, and 

 posterior vein with 19, 9, and 7 bristles, respectively. Legs 

 of fore pair with the femora deeply sinuate on outer surface at 



