136 Journal New York Entomological Society, f^'"'- X-^ni- 



Measurements of holotype : Length 1.79 mm.; head, length 0.240 mm., width 

 0.216 mm.; prothorax, length 0.304 mm., width (inclusive of coxte) 0.525 mm.; 

 pterothorax, width 0.468 mm.; abdomen, width 0.588 mm.; tube, length 0.159 

 mm., width at base 0.123 mm., at apex 0.03S mm. 



Antennae : i 



Length (/j.) 30 



Width (fi) 42 



Total length, 0.466 mm. 



Described from one male collected from a pine stump at Orlando, 

 Florida, November 5, 1914, by C. B. Williams. 



This species is particularly noticeable because of the unusual col- 

 oration of the third to fifth antennal segments, which are very dark 

 at the base and lighter in the apical portions. It is the only known 

 North American species with a grooved tube. 



Polyphemothrips tibialis new species. (Plate X., figs. 4, 5.) 



Male (macropterous). — Length about 2.1 mm.; width of pterothorax 0.43 

 mm. Color dark brown with reddish brown hypodermal pigment ; tarsi, tibiae, 

 and apices of femora pale yellow; segments i, 2, and 3 of antennae yellow, 3 

 slightly darker at apex, rest of antenna dark; tube orange brown in basal 

 two-thirds. 



Head about 1.5 times as long as width at base, prominently elevated, widest 

 behind eyes, vertex only very slightly overhanging base of antennae ; cheeks 

 abruptly swollen on ventral lateral margin just behind eyes, thence very slightly 

 converging to basal three-tenths, and widening again at base, the relative widths 

 of the head at these points being in the relation 20.3: 1S.2 : 19; postocular 

 bristles capitate, slightly longer than the eye. Eyes about one quarter as 

 long as the head, abruptly protruding, lateral margins flattened posteriorly. 

 Ocelli moderately large, approximate, anterior ocellus situated on extreme 

 vertex, posterior ocelli on line with front margin of eyes. Antennae inserted 

 on the ventral surface, seven-segmented, 1.7 times as long as the head; seg- 

 ments I and 2 shortest, 2 distinctly longer than i ; 3-6 claviform, but dis- 

 tinctly shorter and broader than in corticis ; 7 fusiform, truncate at base, with 

 very indistinct and partly incomplete suture two-fifths of length from apex. 

 Color of antennae : segments i and 2 pale transparent yellow ; 3 similar at 

 base but distinctly darker at apex ; 4-7 dark brown. Sense cones long and 

 slender; formula: 3, 1-2; 4, 2-2; 5, i— i ; 6, i-i ; 7 with one at middle of 

 dorsal surface ; there are several small rudimentary cones on 4 and one 

 each on 5 and 6. Labium very broadly rounded, truncate, reaching about 

 three-fourths across the prosternum. 



Prothorax along median dorsal line about 0.49 as long as head and (in- 

 clusive of coxae) about 2.7 times as wide as long, all usual bristles present, 



