206 MB. n, m'lachlan on new-zealand tbiohopteba. 



B. Discoidal cell closed in the posterior wings ; apical forks 2 and 

 5 present ; costulae not united. — Tyj)e P. subnebulosus, Stephens. 



Genus Htdeobiosis, n. g. 



Head — antennae slender, as long as the wings ; basal joint shorter 

 than the head, stout : vertex transverse, hairy : ocelli present : 

 eyes prominent, large : maccillary palpi long aud pubescent ; the 

 two basal joints short and stouter than the others, the second 

 being the longer; third and fourth long and slender, nearly 

 equal in length j fifth not so long as the two preceding, united, 

 and still more slender: labial palpi very smell, the three joints 

 nearly equal. 



Thorax — prothorax concealed; mesothorax large, slightly hairy, 

 the lateral angles prominent, the scutellum raised and elongate, 

 with a depression on each side ; metatJiorax narrower than the 

 widest portion of the mesothorax, the lateral lobes somewhat 

 rounded. 



Legs long and slender ; tibise and tarsi not dilated in the $ , 

 slightly provided with spines in both sexes ; tarsi slender, the 

 joints with short spines at the apex ; claws rather long ; spurs 



' 2, 4, 4 ; the pair on the anterior tibiae are small, the two pairs 

 on the intermediate and posterior tibiae long and straight, nearly 

 equal, the subapical pair placed at about four-fifths of the lengtli 

 from the base. 



Wings — anterior vnngs elongate, the costal and dorsal margins 

 nearly parallel, the apex longly elliptical ; clothed with woolly 

 pubescence, and with longer hairs on the veins ; fringes short ; 

 neuration not very distinct ; subcosta straight, joining the cosla 

 a little beyond the middle ; radius running parallel with the 

 subcosta into the apical portion of the costa, and ending in a 

 long fork, somewhat bent before the point of furcation, con- 

 nected with the subcosta at about the middle of the wing by a 

 transverse veinlet ; discoidal cell short and triangular, closed ; 

 apical forks 1, 2, 3, 4, and 5 all present ; fork 1 very long ; a 

 transverse veinlet unites the upper branch of the ramus dis- 

 coidalis, at the point of fxircation, with the radius ; another 

 unites the lower edge of the discoidal cell with the ramus thy- 

 rifer; another, placed much further towards the base, closes 



of that of P. flnvomaculatus, inasmuch as the apical fork No. 1 is not present 

 in the hind wings ; P. orientalis agrees witli P. pucrilis in this respect. 



