June, ipis-l Hood and Williams: New Thysanoptera. 125 



scribed above very fully. They show in the almost complete ab- 

 sence of minute pubescence on the surface of the wing a departure 

 from the normal Terebrantian type and some tendency toward that 

 of the Tubulifera. The species can easily be distinguished from 

 Mcrothrips morgani by the much shorter head, by the form of the 

 antennal segments, by the stout tooth at the end of the fore tibije, 

 which is as large in this female as in the male of morgani, and by 

 the presence of distinct spurs on the hind tibiae. 



Haplothrips (?) bellus new species. (Plate VIII., figs. 2-5.) 



Female (macropterous). — Length about 1.2 mm. Color dark blackish 

 brown, hypodermal pigment red ; femora and tibiae slightly lighter, tarsi pale 

 yellow; antennae dark except for outer half of second, whole of third, and 

 base of fourth segment. 



Head a little more than 1.2 times as long as wide, cheeks very slightly 

 converging behind ; vertex slightly produced, the anterior ocellus overhanging ; 

 surface faintly sculptured, more distinctly behind, set with a few inconspicu- 

 ous bristles ; postocular bristles capitate, about as long as the eyes. ,Eyes 

 small dorsally, only about one quarter the length of the head, rounded, not 

 protruding ; on ventral surface of head produced posteriorly in an acute angle 

 about 1.3 times their dorsal length. Posterior ocelli opposite a line drawn 

 behind anterior third of eyes. Antennae about 1.6 times the length of head, 

 slender; segment i about two-thirds as long as 2 and three-fourths as long 

 as wide; 21 about 1.4 times as long as wide; 3 and 4 svibequal and the 

 longest ; s and 6 successively shorter, nearly barrel-shaped, pedicellate ; 7 

 oblong, briefly pedicellate, 1.9 times as long as wide; 8 about 1.4 times as long 

 as wide and about three-fourths as long as 7 ; sense cones slender ; formula : 

 3, I— I ; 4, 2—2; 5, I— i+i; 6, I— i+i; 7 with one on dorsum near apex; color 

 of I dark, slightly lighter than the head ; 2 fading to light at apex, darker on 

 inner surface ; 3 light, shading slightly to apex ; 4 dark except at base ; rest 

 very dark. Labium bluntly rounded, labrum just attaining its tip. 



Prothorax .57 as long as the head and (inclusive of coxae) about two 

 and one-fourth times as long as wide ; surface smooth, with median thick- 

 ening near the middle ; bristles capitate, except anterior marginals which 

 are short and pointed ; posterior laterals longest, about as long as post- 

 oculars ; a few minute spines scattered over surface of pronotum. Pterotho- 

 rax slightly narrower than prothorax, sides converging behind, fore angles 

 sharply rounded. Wings not narrowed at middle, colorless, fringe sparse ; 

 fore wings without accessory bristles on posterior margin. Fore tarsi unarmed. 



Abdomen about as wide as pterothorax. Tube half as long as head 

 and about 1.8 times as long as the basal width, which is slightly more 

 than twice the apical. Abdominal bristles pointed, brownish ; terminal bristles 

 about .8 as long as tube. 



