INSECUTOR INSCITI^ MENSTRUUS 99 



Arrhenothrips ramakrishnae, new species. (PI. IV, figs. 

 1 and 2.) 



Female {macro ptcrons). — Length about 2.5 mm. Color 

 dark blackish brown, with head, fore femora, middle and 

 hind tarsi^ and interstices of pterothoracic plates paler ; fore 

 legs with tibiae, tarsi, and apices of femora yellow, the tibiae 

 darkened with gray or brown, particularly along outer sur- 

 face ; antennae with segment 1 and inner basal half of segment 

 2 blackish brown, the remainder clear lemon yellow and of 

 deeper tint toward apex. 



Head about 1.65 times as long as wide, as broad across 

 eyes as slightly behind them, cheeks nearly straight and 

 slightly converging to base ; vertex full, very slightly produced ; 

 dorsal and lateral surfaces deeply transversely striate with 

 anastomosing lines, giving the cheeks a slightly roughened or 

 serrated appearance ; postocular bristles shorter than eyes, 

 dilated at apex. Eyes one-third as long as head, prominent, 

 slightly wider than their interval. Ocelli equidistant ; anterior 

 ocellus overhanging, opposite anterior margin of eyes ; pos- 

 terior ocelli opposite anterior half of eyes. Antennae (PI. IV, 

 fig. 2) about 1.6 times as long as head; sense cones short and 

 inconspicuous; formula: 3, 0-1; 4, 1-2+'; 5, 1-1+'; 6, 1-1+'; 

 I with one on dorsum near apex. 



Prothorax equal in length to head and (inclusive of coxae) 

 nearly 1.7 times as wide as long, with dark median line, surface 

 rather deeply subreticulate with anastomosing lines ; all usual 

 bristles present, anterior marginals and midlaterals small and 

 pointed, others well developed and blunt, the two pairs near 

 posterior angles longest and subequal to postoculars ; coxal 

 bristle about equal to anterior angular. Pterothorax wider 

 than long and about equal in width to prothorax, sides slightly 

 arcuate and converging posteriorly. Wings yellowish at base ; 

 fore wings with the three subbasal bristles about equal to coxal 

 bristle and dilated at tip, with about fifteen accessory hairs 

 on posterior margin. Fore femora about 1.5 times as long 

 as and distinctly wider than head ; fore tibiae produced and 



