244 THE CANADIAN ENTOMOLOGIST 



three long, pointed pairs; terminal bristles brown, about one and 

 one-half tirnes as long as tube. 



Measurements of holot>pc: Length 1.76 mm.; head, length 

 0.274 mm., width 0.192 mm.; prothorax, length 0.180 mm., width 

 (inclusive of coxa?) 0.366 mm.; pterothorax, width 0.372 mm.; 

 abdomen, width 0.378 mm.; tube, length 0.168 mm.; width at base 

 0.081 mm., at apex, 0.038 mm. 



Antennal segments 12 3 4 



Length (m) 42 35 66 69 



Width (m) 42 33 39 38 



Total length of antenna, 0.431 mm. 



Male {macropterous). — Length about 1.6 mm. Colour and struc- 

 ture essentially as in female. Genal spines a little stouter than in 

 female. Antenn;e 1.7 times as long as head, more slender. Tarsal 

 tooth large, stout, cur\'ed. Abdomen slightly narrower than 

 pterothorax. Tube about 0.54 as long as head, about twice as long 

 as greatest subbasal width, which is about twice the apical, sides 

 slightly concave. Segment 9 of abdomen with the lower lateral 

 and the dorsal bristles longer than tube and pointed, the upper 

 laterals very short (three-fifths as long as basal width of tube) 

 stout, pointed, and dark in colour. 



Measurements of allotype: Length 1.56 mm.; head, length 

 0.246 m.ni., width 0.168 mm.; prothorax; length 0.157 mm., width 

 (inclusive of coxie) 0.318 mm.; pterothorax, width 0.322 mm.; 

 abdomen, width 0.284 mm.; tube, length 0.132 mm., width at base 

 O.068 mm., at apex 0.033 mm. 



Antennal segments 1 2 3 4 5, 6 7 8 



Length (mV.^ 38 51 63 65 62 54 47 38  



Width (/ij 38 30 36 '34 27 23 20 11 



Total length of antenna, 0.418 mm. 



Described from one female and one male taken between leaf 

 sheaths of sugar cane, at Rose Hall, Berbice, British Guiana, 

 March 2, 1915, by G. E. Bodkin. 



The onlv species of the genus recorded from South America. 



