84 Proceedings of the Biological Society of Washington. 



follows: 3, 1-1; 4, 1+^2 ; 5, 1-1+ 1 ; 6, 1-1 + 1 ; 7 with one on dorsum near 

 apex; three bristles on ventral surface of segment 7 and six on ventral 

 surface of 8, forming a straight comb. Mouth cone short and broadly- 

 rounded at apex, reaching about half across presternum, the labrum 

 scarcely surpassing labium. 



Prothorax about two-thirds as long as head and (inclusive of coxae) 

 nearly 1.9 times as wide as long; pronotum smooth, with distinct but color- 

 less median thickening; all usual bristles present, the anterior marginals 

 minute and pointed, all others and coxal subequal to or slightly shorter 

 than postoculars, prominently knobbed. Wings of nearly equal width 

 throughout; fore pair without accessory hairs on posterior margin near tip, 

 with the first two of the subbasal bristles similar to the prothoracic ones, 

 and with the third subbasal bristle much longer and pointed. Fore tarsi 

 with a strong curved tooth as long as width of tarsus. 



Abdomen of normal form and structure. Tube about 0.55 as long as 

 head and about 2.2 times as long as basal width, which is about 1.8 times 

 the apical, sides straight. Abdominal bristles moderately short, capitate, 

 the longest pair on segment 9 slightly more than half as long as tube; 

 terminal bristles pointed, nearly as long as tube. 



Measurements of holotype (c?): Length, 1.51 mm.; head, length 0.264 

 mm., greatest width 0.167 mm., width at base 0.144 mm.; eyes, length 

 0.084 mm., width 0.051 mm., interval 0.057 mm.; postocular bristles 

 length 0.036 mm.; prothorax, length 0.175 mm., width (inclusive of coxa?) 

 0.328 mm.; pterothorax, length 0.288 mm., width 0.305 mm.; abdomen, 

 greatest width 0.276 mm.; tube, length 0.144 mm., width at base 0.065 mm., 

 at apex 0.036 mm. 



Antennal segments: 12345678 

 Length (/*) 42 54 63 63 63 64 44 24 



Width Gu) 39 30 25 29 27 27 21 12 



Total length of antenna, 0.417 mm. 



Female (macropterous). — Similar in coloration and structure to male. 

 Fore femora about as strongly swollen as in that sex, and fore tarsi about 

 as strongly armed. 



Described from three males and one female, all taken by Mr. A. A. 

 Girault by sweeping in a forest at Nelson, North Queensland. The four 

 specimens were taken September 12, 1912; May 29, 1913; January 8, 1914; 

 and May 21, 1914. The female is in very poor condition, and is mounted 

 in balsam under eleven separate coverglasses. 



This is a very pretty species. Aside from the important structural char- 

 acters which have made a new genus necessary for its reception, it may be 

 known by the unusual coloration. 



Trichothrips connexus, sp. nov. 



Female (macropterous). — Length about 1.5 mm. Color yellowish brown, 

 with segment 3 of antenna?, tips of femora, all tibia? and tarsi, and tube, 

 yellow; wings of both pairs uniform light brown; hypodermal pigment 

 crimson. 



