QP> flood — New Genera and Species of N. A. Thysanopiera. 



mm. Antennal segments: 1, oil/* ; 2, 48m; 3, 162m; 4, 141m; 5, 7-V ; 6, 

 62m; 7, 66m; > s , 23m; 9, 12m; total, .63 mm.; width, .025 mm. 



.Measurements of a female from Monterey, Mexico. — Length, 1.47 mm. ; 

 head, length, .15 mm.; width, .21 mm.; prothorax, length, .20 mm.; 

 width, .2:; mm.; pterothorax, width, .MO mm. ; abdomen, width, .35 

 mm. Antennal segments: 1, Mom; 2, 5(1m; 3, 1M2m; 4, 93m ; 5, 67m; 6, 

 49m; 7, 52m; 8, 25m; 9, 14m; total, .517 mm.; width, .025mm. 



Male. — Similar to female, but slenderer and with longer antennae. 



Measurements of a male from Monterey, Mexico. — Length, 1.07 mm. ; 

 head, length, .147 mm. ; width, .174 mm. ; prothorax, length, .160 nun. ; 

 width, .181 mm.; pterothorax, width, .245 mm.; abdomen, width, .192 

 mm. Antennal segments: 1, 36m; 2, 45m; 3, 154m; 4, 137m; 5, 92m; 6, 

 77m; 7, 78m; 8, 24m; 9, 8m; total, .65 mm.; width, .027 nun. 



Measurements of antenna of male from Brownsville, Texas: — I, 31m; 

 2. 39m; 3, 118m; 4, 100m; 5, 75m; 6, 67m; 7, 75m: 8, 17m; 9, 8m; total, 

 .54 mm. ; width, .027 mm. 



Described from a good scries of both sexes as follows: Monterey, 

 Mex., July 5, 1908, C. A. Hart; Matamoras, Mex., June 30, 1908, 

 ('. A. H.; "Tlahualilo, Mex., Sep. 12, 1910, on cotton, J. P. Conduit" 

 (Coll. A. C. Morgan); Brownsville, Texas, June 23, 25; July 2, 1908, 

 C. A. H. ; Dubois, Illinois, July 2, 1909, C. A. H.; Odin, Illinois, June 

 25, l!t0i», C. A. H. It appears to be common on grass and weeds, as all 

 of Mr. Hart's collections were by sweeping. 



Type locality. — Monterey, Mexico. 



The pale coloration will distinguish this species at a glance. 



No (hawing of the head and prothorax is given because in a large 

 series of carefully mounted specimens I have been unable to find a per- 

 fectly satisfactory dorsal view. The structure of the insect is entirely 

 responsible for this. I have experienced the same difficulty in mounting 

 Franklinothrips vespiformis. 



Family THIilPID/E Haliday. 



Bregmatothrips gen. nov. 

 {fipiyna, the upper part of the head; Gp^, a wood worm. ) 



Head long; vertex swollen, produced, overhanging and slightly sur- 

 passing the base of antennae. Eyes prominent, protruding. Antennae 

 eight-segmented, style much shorter than segment (i; all sense cones 

 simple. Maxillary palpi three segmented. Prothorax elongate, distinctly 

 longer than head and nearly as long as wide, broadest near base ; posterior 

 angles with two long spines; all other prothoracic spines relatively small. 

 Wings, when present, moderately slender and without color pattern ; fore 

 pair with two longitudinal veins reaching nearly to tip; anterior margin 

 of fore wings set with very long and slender spines which are scarcely 

 distinguishable from the fringe. Abdomen acute, the ninth segment 

 elongate; spines long and strong; ninth abdominal segment of male not 

 provided with two pairs of chitinous dorsal projections. 



Type.— Bregmatothrips venuslus sp. nov. 



