NO. 2008. NEW SPECIES OF THYSANOPTERA— MORGAN. 19 



rounded; greatest width only one and one-half thnes that of the 

 head. Sides of abdomen noticeably sculptured. Each dorsal plate 

 two to eight bears two pairs of spines placed in the form of a trapezoid, 

 the anterior pair standing about the middle of the segment and quite 

 near the median line. Spines on ninth segment short, compara- 

 tively stout though indistinct; the sides of the ninth segment almost 

 inclose the tenth segment. Ninth segment long. Tenth segment 

 short and almost retracted within the ninth segment. A curious 

 fan-like ribbed scale or clasper on each lateral margin of the ninth 

 segment near the tip. 



Locality, Pliilippine Islands, 1910. 



Collected by George Compere. 



Food plant, Banyan tree. 



Described from 3 males. 



Female. — Similar to male in shape and coloration, length 1.4 mm.; 

 the body does not narrow posteriorly as evenly as in the male, gradu- 

 ally narrowing from fourth to eighth segments, thence more rapidly 

 to the tip; tenth segment cone-shaped, rounded at the tip; ovipositor 

 not quite reaching the tip. 



Described from 2 females. 



Collected with the males. 



Type.— Cat. No. 15727, U.S.N.M. 



MICROTHRIPS, new genus. 



Ocelli present. Antennae seven-segmented (style one-segmented), 

 seventh segment as long as or longer than the sixth. Eyes pro- 

 truding. Maxillary palpi two-segmented. Head wider than long. 

 Prothorax wider than long and as long as or slightly longer than the 

 head; two spines upon the hind angles. Fore tibiae unarmed. Wings 

 present, long, narrow, only slightly broadened at the base, pointed at 

 the tip. Costal fringe of fore wings sparse but well developed. Hind 

 fringe well developed and long. Costa and veins with spines. Fore 

 wing with tAvo veins which anastamose near base of the wing, thence 

 running near the costa to the tip. Hind wing with a single median 

 vein. Fore wings without bands. 



This genus is very near BaliotJirips Haliday, but differs in not 

 having the wings banded, and in having the two veins of the fore 

 wing joined together from near the base to the tip. 



Type of the genus. — Microthrips piereci, new 



MICROTHRIPS PIERCEI, new species. 

 Figs. 27-30. 



Female. — Length 0.62 mm. (0.56 to 0.73 mm.). General color pale 

 brownish yellow. The brownish tinge is quite pronounced in some 

 specimens ; legs transparent white. 



