H. H. KARNY. 



269 



Prothorax very large, about as long as head, with a median longitudinal 

 wrinkle on the disc, much widened from base to middle, thereafter with nearly 

 parallel, but obtusely-angulate emarginate sides. Connecting hide between head 

 and prothorax with distinct, dotted sculpture; a similar area on each side at the 

 widest place of prothorax. Behind this area a triangular and then a trapezoidal, 

 smooth, strongly chitinized area, separated from the disc by distinct sutures, of 

 which the posterior field bears the postero-lateral bristles. All setae extra- 

 ordinarily long. The antero-lateral ones inserted near the fore-angle, forwardly 

 directed. Antero-marginal bristles from the middle of fore-margin somewhat 



Text-% 



Thaumatothrips froggatti, n.gen. et. sp. (nat. size. 



2, Head of macropterous form. 3. Fore-tibia and tarsus; seen in front. 

 4. Head and prothorax of apterous form. 5. Apterous form with contracted seg 

 ments. 



more distant tlian from the antero-lateral ones. Medio-lateral setae inserted at 

 the end of basal third of the disc-sides. Postero-lateral bristles very long, 

 curved, backwardly directed; postero-marginal ones as far distant from them as 

 from the middle of hind-margin. Further, some short hairs on surface of the 

 disc, and a pair of weak bristles near the middle of hind-margin. Surface of 

 prosternum with a distinct, dotted sculpture. Only a few strongly chitinized, 

 smooth plates ; one longitudinally placed, elliptical at each fore-angle ; one pair 

 of large, semicircular plates before the hind-margin, with strongly convex fore- 

 side and transversely truncate, nearly straight hind-side. Behind them a small, 

 median, transversely-placed, elliptical plate. 



Fore-coxae very large, ovate, with a strong bristle at the outer hind angle, 

 still longer than the postero-lateral ones of prothorax, and behind it a few short 

 hairs. Fore-femora gi-eatly enlarged, considerably longer than head, and nearly 

 half as wide as long; on the outer margin with some short hairs and, in addition, 

 a very long bristle before the middle and a second shorter one before the knee; 



