NORTH AMERICAN THYSANOPTERA— HINDS. 159 



long segments, which are together as long as are the fifth and sixth. 

 ' Maxillary palpi three segmented. Prothorax a little longer than the 



head and somewhat broader at the hind than at the fore edge; no long 

 ilspine at the front angles, but two at each hind angle. Legs unarmed, 

 j Wings usually reduced, but when present they are of medium length, 

 land have two longitudinal veins which are set with small spines. 

 !| I find here only the new upecies fuse ijyetmis. 



RHAPHIDOTHRIPS FUSCIPENNIS, new species. 

 Plate V, fig(^. 46-48. 



FehiaJe. — Length 1.32 nmi. (1.20 to 1.66 mm.); Avidth of meso- 

 thorax 0.21 mm. (0.22 to 0.27 mm.). General color nearly uniform 

 chestnut brown. 



Head as long as wide, but little shorter than prothorax, into which 

 it is retracted a little; anterior margin slightly elevated and rounded; 

 constricted a bit close behind the eyes; cheeks nearly straight behind 

 the constriction and diverging slightly posteriorly so the head is 

 jwidest at hind edge; back of head finely striated. J]yes quite large, 

 tt'ounded, protruding; margins light; ocelli present, larger than facets 

 jof eye. light colored with dark crescentic margins, well separated, but 

 posterior ones not contiguous with margins around eyes; ocellar spines 

 very long and conspicuous; post-ocular spines quite large. Mouth 

 cone extending back to anterior edge of mesosternum, slender, so that 

 head from below appears considerably elongated; labial palpi small; 

 maxillary palpi quite long, slender, and three segmented. Antennas 

 twice as long as head; relative lengths of segments: 



8.25. 



j First segment shortest, cylindrical; second cup-shaped; third pedi- 

 cellate; third, fourth, and sixth are approximately equal in thickness; 

 third and fourth elliptical; fifth constricted at base and increasing in 

 size to apex, where it is cut ofl' abruptly and unites by its entire width 

 to the equally broad base of sixth, which tapers gradually from one- 

 third its length to its apex, w^here it is but slightly wider than seventh; 

 seventh and eighth slender, cylindrical. Color: First and second uni- 

 forndy slightly lighter brown than head; third and fourth pale yellow 

 with slight brownish tinge; fifth shading from color of fourth to a lit- 

 tle lighter than sixth; sixth, seventh, and eighth gray-brown; spines 

 long and fairly conspicuous. 



Prothorax slightly wider than long, widest at posterior angles; sides 

 but slightly arched; no prominent spines at anterior angles; two stout 

 spines stand close together at each posterior angle; surface finely 

 striated and set with a few scattered small spines; bases of spines liglit 



