134 Journal New York Entomological Society. [Vol. xxiii. 



Prothorax about .57 as long as head and (inclusive of coxae) twice as 

 wide as long ; all bristles present, unusually short, blunt. Pterothorax about 

 equal in width to prothorax, sides nearly parallel. Wings colorless, equal in 

 length to head. Fore tarsi unarmed. 



Abdomen slightly wider than prothorax. Tube about .54 as long as head 

 and twice as long as basal width, which is about twice the apical. Abdominal 

 bristles moderately long, brown, mostly blunt, terminal ones nearly as long 

 as tube. 



Measurements of holotype : Length 1.68 mm.; head, length 0.312 mm., 

 width 0.236 mm.; prothorax, length 0.180 mm., width (inclusive of coxae) 

 0.362 mm.; pterothorax, width 0.372 mm.; abdomen, width 0.432 mm.; tube, 

 length 0.162 mm., width at base 0.081 mm., at apex 0.039 mm. 



Antennae : i 



Length (/*) 36 



Width (m) 39 



Total length, 0.41 1 mm. 



Male (brachypterous). — Length 1.39 mm. Head about 1.45 times as 

 long as greatest width; antennae about 1.47 times as long as head, all of the 

 intermediate segments infuscate apically ; wings about 1.3 times as long as 

 head ; fore tarsi unarmed. Otherwise similar to female. 



Measurements of allotype: Length 1.39 mm.; head, length 0.276 mm., 

 width 0.190 mm.; prothorax, length 0.144 mm., width (inclusive of coxae) 

 0.302 mm. ; pterothorax, width 0.2S8 mm. ; abdomen, width 0.305 mm. ; tube, 

 length 0.141 mm., width at base 0.072 mm., at apex 0.032 mm. 



Antennae : 123 



Length (/x) 30 48 66 



Width (iJii) 34 30 29 



Total length, 0.405 mm. 



Described from one female and one male collected from a tree 

 stump at Emeralda, Florida, November 17, 1914, by E. B. Williams. 



BARYTHRIPS n 



ew genus. 



(/3apis. heavy; Spl , a wood worm.) 



Body stout and thick, smooth. Head rectangular, longer than wide, 

 vertex evenly declivous, cheeks straight, smooth. Eyes moderately small, sub- 

 quadrangular. Antennfe slender, eight-segmented, intermediate segments 

 elongate, the last two segments rather closely, but not compactly, joined. 

 Mouth cone reaching about to middle of prothorax, broadly rounded at apex, 

 tip of labrum scarcely attaining that of labium ; maxillary palpi half as long 

 as labrum, two segmented, basal segment short ; labial palpi papilliform. 

 Pronotum (at least in the male) distinctly longer than head, with prominent 



