INSECUTOR INSCITI^ MENSTRUUS 25 



posterior vein with about fourteen similar, equidistant bristles. 



Abdomen of normal form, without sculpture; segment 8 

 with a comb of unusually small, acuminate spines, wanting in 

 median third ; segment 10 not divided above ; abdominal bris- 

 tles long, strong, brown. 



Measurements of holotype: Length 1.06 mm.; head, length 

 0.134 mm., width 0.139 mm. ; prothorax, length 0.132 mm., 

 width 0.196 mm. ; pterothorax, width 0.240 mm. ; fore wing, 

 length 0.708 mm., width at base 0.069 mm., at middle 0.051 

 mm. ; abdomen, width 0.312 mm. 



Antennal segments 1 2 3 4 5 6 7 8 



Length (n) 32 37 47 54 39 53 11 21 



Width (^i) 26 24 18 18 16 18 7 5 



Total length of antenna, 0.294 mm. 



Described from six females collected by Mr. J. W. Bailey at 

 Brownsville, Texas, June 25, 1914, from an unidentified plant. 



Differs from both Ph. ehrhornii and Ph. longirostrum — the 

 only other dark colored species of the genus known from North 

 America — by the elongate fourth segment of the antennae. 



Thrips impar, new species. 



Female. — Length about 1.2 mm. General color brown ; head 

 maize yellow,^ darkened with brown at sides and base, ocellar 

 pigment carmine ; prothorax buffy brown, concolorous with 

 darker parts of head, with orange hypodermal pigmentation ; 

 pterothorax slightly paler than prothorax, with orange hypo- 

 dermal pigmentation ; abdomen concolorous with or slightly 

 darker than prothorax, the last three segments paler ; antennae 

 mouse gray, second segments much the darkest and with 

 decided orange tinge; fore wings nearly uniform light mouse 

 gray; legs yellow, the femora often shaded with brown or 

 gray. 



Head about 1.4 (1.33-1.5) times as wide as median dorsal 

 length, about four-fifths as long or prothorax, broadest be- 

 tween eyes and base, and with distinct anastomozing lines of 



1 Ridgway. Color Standards and Color Nomenclature. Washington, 

 1912. 



