Hood — New Genera and Species of X. A. Thysanopterd. 71 



To the present genus, which is probably !>est placed near Ifaplothrips, 

 I have assigned a single, minute, wingless species remarkable for the very 

 broad, infundibuliform bristles, the peculiar structure of the vertex, and 

 the swollen, armed femur of the male. 



ScopaiOthrips unicolor sp, nov. 



Fig. 4, a and b. 



Female : forma bracyptera. — Length about .it mm. Color dark blackish 

 In-own, pterothorax often paler when viewed by reflected light; tarsi, 

 apices of fore tibiae, and antenna! segments 3-6, yellow. Dorsal surface 

 sculptured, shining. 



Head slightly wider than long; cheeks subparallel, with a short, collar- 

 like widening at base; dorsal and lateral surfaces with deep, close, trans- 

 verse strke and short stout spines; postocular bristles short, infundibuli- 

 form, similar in size and shape to a pair at the posterior angles of the 

 the eyes. Eyes rather 

 coarsely faceted, with 

 occasional brief spines 

 between facets. Pos- 

 terior ocilli directed 

 antero-laterally. An- 

 tennae slender, slightly 

 more than twice as 

 long as head ; segments 

 1, 2, 7, and S concolor- 

 ous with body, except- 

 ing apex of 2, which 

 is distinctly yellowish; 

 :;-!) uniform pale yel- 

 low, clavate, pedicel- 

 late; 7 oblong, pedi- 

 cellate; 8 subcorneal ; 

 sense cones moderately 

 stout, almost perfectly transparent; formula: .'!, 0-0; 4, 1-1; 5, 1-1 + '; 

 (J, 1-1 ; 7 with one on dorsum near apex. 



Prothorax about .7 as long as head and (including coxa-) about two 

 ami one-half times as wide as long; all usual spines present, very short 

 and broadly infundibuliform;* coxal spine wine-glass-shaped as seen from 

 above; dorsal surface at each side with a depressed and concentrically 

 striate area which is lobed mediad ; remainder of dorsal surface trans- 

 versely striate. Pterothorax lar^e, broader than prothorax, subrectan- 

 gular; mesonotum closely transversely striate (the striae bent posteriorly 

 at the median line) and with two pairs of dilated equidistant bristles on 

 posterior ed^e; metanotum with a pair of similar bristles at middle (about 



* The bristles are all pale ami transparent, and in balsam mounts visible under high 

 power only after a vers careful adjustment of the light. In the figure the bases of sev- 

 eral have been shown although the bristles themselves could not ]><• distinguished 

 against the dark-colored notum. This i> true also of Rhopalothrips bimlor sp. nov. 



Fig. 1- 

 bead and 



■Scopseothrips unicolor gen. et sp. nov. 

 prothorax, female, x93; 6. right fore leg, 

 male, ventral view. x283. 



