194 PROCEEDINGS OF THE NATIONAL MUSEUM. 



Genus CEPHALOTHRIPS Uzel. 



Head considonil)ly lonj^cr tluui its breadth or the length of the pro- 

 thorax, broadly rounded in front and larij;-er than in nio.st .species in 

 proportion to the other segments. Eyes small; ocelli present. Anten- 

 na' about one and one-half times the length of the head. Mouth cone 

 shorter than itsj>readth at base; labrum not narrowed in the middle 

 and ending in a ])lunt point. Fore femora slightly thickened and 

 tarsi with a tinv tooth. Wings usually rcnluced or wanting- entirely. 

 Male without a scale at base of the tube. 



1 place here oidy one species, j/iiccn'. 



CEPHALOTHRIPS YUCCiE, new species. 

 Plate VIII, figs. 83, 84. 



Female. — Length 1.48 mm. (1.40 to 1.56 mm.); width of meso- 

 thorax 0.21) mm. (0.28 to 0.30 mm.). General color yellowish brown, 

 irregularly mottled ^vith dark-red hypodermal pigmentation. 



Read broad and large, about one and tw^o-tifths times as long as 

 wide; cheeks slightly arched and smoothly joined to eyes, converging 

 slightly toward neck; front smoothly rounded; post-ocular bristles 

 present, but rather small and not prominent; cheeks smooth. E3'es 

 small, each being less than one-fourth the l)readth of the head through 

 them, triangular above and surface even with that of head, very dark 

 red in color; ocelli small, situated far forward, quite widely separated, 

 with very dark red inner margins. Mouth cone short and rather 

 blunt. Antenna3 nearly one and one-half times as long as head, con- 

 siderabl}" separated at liases with but slight elevation between them; 

 relative lengths of segments as follows: 



Segments three to live subequal in breadth and similar in shape. 

 Antenna? yellow, segments one and two shaded with brownish. Sense 

 cones quite long and slender; spines shorter and light colored, so 

 inconspicuous. 



Prothorax two-thirds as long as head and across outer angles of 

 coxte about one and two-fifths times as wide as head; sides of thorax 

 really considerably indented above fore coxa?. Anterior marginal 

 and mid-lateral spines wanting; those at angles present, but weak and 

 inconspicuous. Pterothorax as broad as prothorax through coxa", 

 equal to about one-fifth the length of the body; its sides straight and 

 parallel; a])out four-fifths as broad as abdomen. Wings usually 

 reduced to mere pads, but when occasionally present they are of mod- 

 erate length, though not very powerful. (Winged specimens have the 



