264 Mr. R. 8. Bagnall on Thysanoptera 
Suborder TEREBRANTIA, 
Family Thripide, s. 1]. 
Genus TRYPHACTOTHRIPS *, nov. 
Belonging to the Heliothripid group and coming nearest 
Dinurothrips, Hood. Uead transverse, cheeks converging 
posteriorly ; anteriorly between eyes and also cheeks with 
frill-like explanate margins. Prothorax transverse, without 
long bristles and with the lateral margins broadly explanate, 
especially anteriorly. Fore-wings stouter than in Dinuro- 
thrips, spines on costa and veins moderately long and stout. 
Apical abdominal segments somewhat produced, though not 
to the same extent as in Dinurothrips. 
Chiefly recognised by the peculiar and striking shelf-like 
explanate margins of head. 
Type. Dinurothrips rutherfordi, Bagn.f. 
1. Tryphactothrips breviseétis, sp. n. 
(Pl. LV. fig. 2 6 (also note figs. 1-2 a).) 
There is a single example of this curious genus in Dr. 
Scott’s collection, but unfortunately the shelf-like explana- 
tions of the head and thorax are mutilated and the wings, 
laid down the back, are difficult to see. This species comes 
very near to 7. rutherford: (Bagn.), a species found on 
leaves of Al/amanda in Ceylon and is of the same size and 
form. The fore-wing appears to be medianly brown with a 
diffused ill-defined band across the third eighth and another 
before apex; the extreme tip of the wing appears to be 
noticeably lighter than the median portion. The bristles 
are differently disposed, entirely brown, and only 0°5 to 0°6 
the length of those in 7. rutherfordi. The bristles of the 
lower vein are disposed as follows:—2+438 (or 2)+14+41, 
which in the figured wing of rutherford are 2+1+1+4+3+41. 
In 7. rutherfordi these bristles are at least 1°3 times 4s 
long as the median breadth of the wing, in breviselis about 
0:7 the breadth, 
It is hoped more material may be forthcoming. 
* T am indebted to my friend, the Rev. W. M. Teape, for suggestin® 
this generic name, the affix of which is derived from a rare word found 
in an inscription on the stone fence round Herod’s temple, meaning a 
fence or balustrade (? lattice).—R. 8. B. 
+ A table of species is given in Ann. & Mag. Nat. Hist. ser. 9, vol. iv. 
p. 255 (1919). 
