8 MISCELLANEOUS PAPERS. 



2 often, 7 usually about one-half as long as the remaining segments 

 of the abdomen. 



Male: Length about 1.08 mm.; coloration similar to that of female. 



Described from numerous specimens, both male and female. 



Living specimens, when viewed under a hand lens, appear to be 

 velvety black upon the head, pterothorax, and tip of the abdomen. 



This species was very abundant in 1910, from April to October, 

 upon one plant of a large perennial lupine near San Jose, Cal., and 

 is very active in flying and leaping (P. R. Jones). 



The larvag were abundant also and these, together with the adults, 

 were so numerous as to completely ruin the foliage of the above plant. 

 Very few specimens were in the flowers. 



Named for Mr. Dudley Moulton in recognition of his very valuable 

 work on American Thysanoptera. 



13. Genus LIMOTHRIPS HaUday. 



Key to the Species. 



1. Segment 2 of antennae drawn out into a prominent, acute, triangular process on the 



outer angle Limothrips setarise. new species. 



2. Segment 2 of the antennae simple Limothrips cerealium Haliday. 



(Synonym, L. avenx Hinds.) 



DESCRIPTION OF NEW SPECIES. 



Limothrips setarise new species, female. (PI. Ill, figs. 1-5.) 



Measurements: Head, length 0.216 mm., width at eyes 0.166 mm., 

 width at back of head 0.2 mm.; prothorax, length 0.183 mm., width 

 0.233 mm.; mesothorax, width 0.333 mm.; abdomen, width 0.35 mm.; 

 total length of body 2.116 mm. Antennae: Segment 1, IS//; 2, 45/x; 



3. 51/i; 4, 45/i; 5, 48/(; 6, 60;<; 7, 12;i; 8, 18//; total length of antennae 

 0.30 mm. 



Color dark yellowish brown, ends of tibiae and tarsi lighter. 



Head slightly longer than wide, diverging posteriorly; cheeks very 

 slightly arched; back of head scarcely striated at all; a pair of spines 

 in front of anterior ocellus, one in front of each posterior ocellus, 

 one posterior to each eye, and a row of four spines midway between 

 base of eyes and posterior margin. Front strongly produced anteri- 

 orly, considerably so between the bases of the antennae. Eyes moder- 

 ately prominent, black, with yellow borders, protruding slightly, 

 coarsely faceted, not pilose. Ocelli well separated, anterior one 

 smallest, posterior ones contiguous with inner margins of the eyes; 

 brownish yellow, with dark-brown crescents; not situated far forward. 

 Mouth-cone obtusely pointed, extending past middle of prosternum; 

 maxillary palpi short, 3-segmented. Antennse 8-segmented, about 

 one and one-half times as long as the head, slender, uniformly dark 

 brown except segments 2, 3, and 4, which are slightly lighter. Seg- 

 ment 1 very short and thick; 2 large, drawn out into an acute triangular 



