240 



JAMES WATERSTON. 



either side ; comb of the first tarsal joint of 9-10. Mid legs : coxae bare, except 

 for two stout bristles, one above the trochanter and one apical ; tibial spur short, 

 not three-fourths of first tarsal joint. Hind legs with tibial comb of 9 or 10 spines. 

 The proportions of the tarsal joints are :• — 





i. 



ii. 



iii. 



iv. 



Front 



30 



35 



30 



50 



Mid 



50 



45 



35 



55 



Hind 



55 



50 



35 



60 



Abdomen.- — Surface not densely clad ; the bristles short ; first and second tergites 

 with 6 each ; third and fourth tergites, 7 to 9 on each side, with one or two in front ; 

 on the fifth tergite, one or two more bristles in each row ; the sixth and seventh 



Fig. 5. Tetrastichus sculpturatus, sp. n., $ ; «, right wing ; b, radius ; c, junction 



of marginal and submarginal. 



have a posterior row of about 14 bristles, with at each side, 6 or 7 ; 16 bristles between 

 the stylets ; the free sheath is one-third of the base. 



Length, 2 mm. ; alar expanse, 3 '75 mm. 



(J. Antennae pale to the end of the funicle, with sense organ on the scape narrowly 

 darker ; club darker. Head, body and wings as in the $, the wings of nearly the 

 same tint in both sexes. Legs with coxae black, the remainder yello\vish, the femora 

 at most with darker upper and lower edges ; the fore femora hardly darker than the 

 others. 



Head.' — Antenna (fig. ia). Length, '9 mm. ; scape much swollen, about half as 

 broad as long, with one or two more bristles on the apical external surface than in the 



