86 Proceedings of the Biological Society of Washington. 



Genus Teuchothrips, nov. 

 (reOxos, an implement of war; dpuj/, a wood worm.) 



Head broad, not more than 1.2 times as long as wide, subequal to or 

 much longer than prothorax; vertex either slightly produced and over- 

 hanging or with the front margin nearly straight and vertical, the anterior 

 ocellus overhanging; cheeks and occiput distinctly (sometimes deeply) 

 subreticulate, the former arcuate to eyes and base of head. Eyes of mode- 

 rate size, somewhat shorter and narrower on ventral surface. Antennae 

 eight-segmented, the last two segments usually compactly united and form- 

 ing a single mass. Mouth cone rounded at apex, reaching half way or more 

 across presternum, the labrum not surpassing labium. Prothorax from 

 0.6 to 0.9 as long as head, bristles usually short and capitate. Fore tarsi 

 with a long, stout, curved tooth. Wings broad, closely fringed, not nar- 

 rowed at middle. Tube long, usually nearly equal in length to head, sides 

 straight. 



Genotype: Teuchothrips simplicipennis, sp. nov. 



This genus comprises, in addition to the two new species simplicipennis 

 and badiipennis described below, four species, also from Australia, which 

 were described by the author under the generic name Liothrips. 1 These 

 four species should thus be known as Teuchothrips disjunctus, T. connatus, 

 T. gracilior, and T. brevidens. The present genus appears to be separable 

 as a natural segregate of the genus Liothrips, differing in the short, reticu- 

 lated head, the broadly rounded mouth cone, the strongly armed fore 

 tarsi, and the frequent union of the two distal antennal segments. 



Teuchothrips simplicipennis, sp. nov. 



Female (macropterous) . — Length about 2 mm. Color dark blackish 

 brown or black, with mid and hind tarsi brown, and distal ends of fore 

 tibiae, and basal half of segment 3 of antennae, yellow; wings clouded with 

 brown, the fore wings darker than hind ones and with the scale and the 

 region of the three subbasal bristles much darker; hind wings paler in 

 anterior half, the line of demarkation darkened, especially at base. 



Head very slightly wider than long, entire dorsal surface deeply and dis- 

 tinctly reticulate with anastomosing lines; cheeks converging to eyes and 

 base of head, which is about 0.92 of the greatest width; vertex not or only 

 very slightly produced, anterior margin nearly straight and vertical; post- 

 ocular bristles short, about one-third as long as eyes, dark in color, capitate. 

 Eyes about 0.4 as long as head, not protruding, two-thirds as wide as their 

 interval; ventral length about five-sevenths of dorsal, ventral width a little 

 more than half of ventral interval. Anterior ocellus slightly overhanging, 

 directed forward. Antennae of normal structure, about 2.19 times as long 

 as head, segments 7 and 8 compactly united to form a single mass, 8 short, 

 about 1.8 times as long as greatest basal width; sense cones short and in- 

 conspicuous, formula: 3, 0-1; 4, 1-2+ l ; 5, 1-1 + 1 ; 6, 1-1 + 1 ; 7 with one on 

 dorsum near apex; segments 1, 2 and 4-8 dark blackish brown, with apex 



iMemoirs of the Queensland Museum, Vol. VI, pp. 134-138; Dec. 19, 1918. 



