694 FAUNA HAWAIIENSIS 



Apart from being a unicolourous black, T. nigricans may be easily separated from 

 T. laticontis by its shorter and broader fore-legs, the broader abdomen, and the short 

 and broad tube. 



Hab. Oahu ; one female, Kaala Mts., over 2000 feet, January 1893 (Perkins, 

 No. 56). 



Agncstochthona Kirkaldy. 



Kirkaldy, Proc. Hawaiian Entomological Society, i. p. 102, 1907. 



" Belongs to the Tubulifera and differs from Anthothrips Uzel by the vertex being 

 very slightly longer than wide anteriorly and slightly though distinctly wider anteriorly 

 than posteriorly ; it is longer than the pronotum medianly. Face elongate, angularly 

 rounded at the apex, reaching nearly to the base of the prosternum. First segment of 

 antennae as long as, or longer than, the second, and is much stouter ; third and fourth 

 a little wider than the others. Tegmina not constricted medianly. Spine on the fore- 

 tibiae somewhat large in the female." 



Type. Agnostochthona alienigera Kirkaldy. 



(i) Agnostochthona alienigera Kirkaldy. 



" Sordid yellowish-brown, dark fuscous on head and pronotum and on the 6th — 8th 

 antennal segments. Eyes rounded, not protruding. Ocelli widely separated, large, 

 posterior pair contiguous with the internal margin of the eyes, front one almost between 

 first segments of the antennae, which are subcontiguous. Relative lengths (from base) 

 6, 6, 8, 10, 8, 8, 6, 5 ; 3rd — 6th, basally subpedicellate ; hairs moderate. Post-ocular 

 bristles very long, one on each side. Cheeks without bristles. Pronotum roundly 

 emarginate apically, rounded posteriorly, lateral margins distinctly diverging posteriorly, 

 posterolateral angles rounded. Fringe-hairs of wings simple, long. Abdominal 

 bristles sparse, slender, mostly large. 



" %. Tube about one-half longer than the preceding segment. Length about 

 If mm. 



There are many genera allied to Anthothrips, and, though in all probability the 

 genus Agnostochthona is a valid one, the above characters are much too meagre upon 

 which to erect a genus ; in fact as the description now stands the type species may be 

 relegated to any one of several genera, not a single character of generic value is 

 emphasized in the diagnosis. P'rom the short specific description it is clear that the 

 species is not represented in the collection made by Dr Perkins. As yet we have not 

 had the opportunity of examining Kirkaldy's types ; this will be necessary before its 

 true position can be made clear. 



Hab. Oahu; Mt. Tantalus, 1500 feet, collected by Mr F. W. Terry from under 

 the bark of a dead tree, where it occurred in numbers and in all stages. 



