90 INSECUTOR INSClTl.^i MENSTRUUS 



ON SOME NEW THYSANOPTERA FROM 

 SOUTHERN INDIA 



By J. DOUGLAS HOOD 



The material described below was transmitted for deter- 

 mination by T. V. Ramakrishna Aiyar, Government Entomolo- 

 gist, and was collected at Coimbatore, Southern India. I have 

 taken pleasure in naming one of the more interesting species 

 in his honor. 



Scirtothrips dorsalis, new species. 



Female {macro pterous). — Length about 0.9 mm. Color 

 straw yellow, sides of thorax slightly darker ; abdominal seg- 

 ments 3-8 each with a basal transverse dark line in the median 

 fourth followed posteriorly by a light brown blotch ; segment 

 2 of antenna about concolorous with body, segment 1 paler, 

 3-8 gray-brown, 3-5 paler basally, 4 and 5 each with a narrow 

 dark ring at base ; fore wings nearly uniform gray, hind wings 

 pale, with dark median line. 



Head about 1.77 times as wide as long and about 0.7 as 

 long as prothorax; cheeks nearly straight, slightly converging 

 posteriorly ; frontal costa nearly 0.9 as wide as basal antennal 

 segment. Eyes slightly protruding, fully three times as long 

 as their distance from posterior margin of head, 0.7 as wide 

 as their interval, setose. Ocelli approximate, opposite center 

 of eyes, pigment bright red. Antennae three times as long as 

 head, normal to the genus. 



Prothorax about 1.5 times as wide as long; pronotum with 

 minute, close, transverse striae visible only under high magni- 

 fiqation, and a few scattered dark bristles, the pair at the 

 posterior angles short, stout, and dark, equal in length to seg- 

 ment 2 of antenna. Pterothorax about 1.3 times as wide as 

 prothorax. Wings of fore pair about eleven times as long 

 as greatest subbasal width exclusive of scale, 2.65 times as 

 long as antennae, and nearly 4.5 times as long as width of 

 head ; anterior vein with a group of three dark bristles in basal 

 fourth, a second group of three in second fourth, one bristle at 



