NEW GENERA AND SPECIES OF A.VSTBALIAN TUXSANOFIEEA—TIOOD. 145 



Prothorax along median dorsal line about 0-4 the length of head, witlioiit median 

 thickening ; anterior marginal bristles wanting, all others present, pointed, the 

 posterior pairs mueh the longest. Fore tarsus with a stout, slightly curved tooth. 

 Wings wanting. 



Abdomen stout and hea\y. Tube about 0-7 as long as head, sides straight. 

 Abdominal bristles long, ])ointed. yellowish, those at apex of segment 9 about O-fi 

 the length of tube. 



Measurements of lioiutyjie : — Length 2-52 mm. ; head, length 0-45G mm., width 

 0-21 (i mm. ; prothorax, length 0-lSl )nm., width (inclusive of coxae) 0-427 mm. ; 

 pterothorax, width 0-396 mm. ; abdomen, width 0-540 mm. ; tube, length 0-312 mm., 

 width at base 0-1 14 mm., at apex 0-051 mm. 



Ajiteimal segments: I, length 69/x, width 48/x ; 2, length 72/i, width 39/^; 

 remainder of antenna wanting. 



Described from one male taken by " sweeping floor of forest. Double Island 

 (mainland)," Queen.sland, December 24, 1911, by Mr. A. A. Girault. 



The decidedly anomalous character of this species seems to warrant its descrip- 

 tion at the present tinie, even from a specimen as poorly jDrescrved as the type. While 

 the muisual colouration maj' not perhaps lie normal, the very long, slender head and 

 the small, protruding eyes mark it at once as very distinct. It is a true Cri/ptothrips, 

 as that genus is at present interpreted, and is allied to Uzel's icarufi. 



CRYPTOTHRIPS DIMIDIATUS sp. nov. 



Female {apieroii.s). — Length about 1-4 nun. Head and thorax yellow, the 

 former darker and the latter washed at sides with brown ; legs and antennae lemon 

 yellow, the latter with segments 7 and S (rarely .5-8) infuscate ; abdomen blade. 



Head nearly smooth, about I-IO times as wide as long, narrowed posteriorly ; 

 vertex flat and evenly declivous ; postocular bristles about as long as dorsal length of 

 e\'es, pointed ; another pair of pointed bristles about half a.s long between and near 

 eyes. Eyes scarcely protruding, small and very widely separated, produced posteriorly 

 on ve!itral surface of head. Ocelli wantin.g, or only minute anteiior ocellus present. 

 Antennae of the same general .structure as in C. (jilvipes {-ee Proc. Biol. Soc. Wash., 

 vol. xxvii, 1914, pi. v, fig. 4), but stouter and with the intermediate segments m^re 

 rounded ; segment 3 with one sense-cone on inner and one on outer surface. Mouth- 

 cone short and broadly rounded, 



Prothorax with all usual bristles present, pointed, the two posterior pairs 

 about equal in length to postoculars ; midlaterals, anterior laterals, and anterior 

 marginals successively shorter, Pterothf)rax small and narrow. Fore tarsus unarmed. 



Abdomen stout, heavy, nnich broader than pterothorax. Tube about three- 

 fourths as long as head, twice as wiilc at base as at apex, sides parallel in basal fifth, 

 thence converging to apex ; all bristles brown, pointed, the terminal bristles shorter 

 than tube. 



