NO. 2008. NEW SPECIES OF THYSAWOPTERA— MORGAN. 25 



Collected August 1, 1910, by the writer and S. E. Crumb. 

 Life history unknown, except that the specunens were feeding 

 upon the under sides of the leaves of the host plant. 

 Type.— C&t. No. 15730, U.S.N.M. 



THRIPS SPINOSUS, new species. 



Figs. 42-43; 45-46. 



Female.— Length 1.26 nim. (1.16 mm. to 1.35 mm.). (Specimens 

 somewhat distended.) Width about one-fourth the length. Color 

 quite uniformly light brown, with a tinge of yellow, except the 

 ninth abdominal segment which shades to dark brown at the tip, 

 and the tenth which is dark brown. 



Head one-third wider than long, widest behind; cheeks slightly 

 arched behind the eyes; occiput distinctly transversely striated; 

 front slightly produced between the eyes; a promment spine in 

 front of each posterior ocellus, a smaller spine behmd each posterior 

 ocellus and two similar spines behind each eye distinctly noticeable, 

 other spines upon head small and inconspicuous; eyes not protruding, 

 rather coarsely granulated, dark purplish by reflected light, black 

 by transmitted light, pilose; ocelli subapproximate, the posterior 

 ones standing back of the center of the eyes, and not contiguous 

 with their margins; color light yellow margined inwardly with dark 

 red crescents. Mouth cone distmctly narrowed in the middle, 

 slender, reaching three-fourths across prothorax; maxillary palpi 

 slender, three segmented, the first segment slightly longer than 

 either of the other two which are about of equal length. Antennae 

 seven segmented; relative lengths of segments as follows: 



1 A -1- 1. -A_ A- L 



8 11 16.5 17 12.7 15.5 6 



Segment one short, semiglobose; two cup shaped; three and four 

 pedunculate elongated ovoid; five slightly pedunculate elongate, 

 joined by a moderately broad surface to base of sLx, which tapers 

 from its middle to its apical end; seven tapering, slightly rounded at 

 apex. Segment three bears a transparent branched sense cone on 

 the upper surface near the tip, and segment four bears a similar cone 

 upon the under surface near the tip. Spines upon antennal segments 

 two to five rather slender but distinct. Spines upon other segments 

 rather muaute. Segment one light yellowish brown; two light 

 brown; three light yellowish brown, the brown tinge more pronounced 

 toward the apex; four with peduncle almost transparent whitish, 

 remainder light yellowish darkenmg toward the apex; five, six, and 

 seven light brown except base of five, yellowish brown. 



Prothorax rectangular, angles more rounded behind than in front, 

 as long as head and one-half wider than long; pronotum indistinctly 



