Mr. R. Shelford’s Studies of the Blattide. 247 
and the variation is almost an epitome of the changes 
whereby the small triangular apical field of such genera as 
Ectobia and Theganopteryx has become modified into the 
large parabolic apical area of the genus Anaplecta. 
Anaplecta chrysoptera, n. sp. (Plate XVI, fig. 7.) 
Q. Very convex. Rufous. Antenne testaceous; third joint of 
maxillary palpi black ; pronotum with lateral margins rufo-testace- 
ous ; abdomen and cerei castaneous, the apical joint of the latter 
yellow. Marginal field of tegmina nearly half the total breadth, 
thirteen parallel costal veins ; the tegmina strongly overlap, veins of 
discoidal field of left tegmen obsolete, strongly marked in that part 
of the right tegmen which is covered by the left, the ulnar vein 
sends six branches to the sutural margin, anal vein strongly marked, 
axillary veins obsolete. Wings with the apical area and marginal 
field golden-yellow, fourteen costal veins, their ends slightly swollen, 
radial vein straight, medio-discal field crossed by eight transverse 
venul, ulnar vein simple, first axillary vein quadri-ramose, apical 
area two-fifths of total wing-length, its basal margin obtusely angled. 
Supra-anal lamina transverse, sub-genital lamina large, its posterior 
border shortly cleft and compressed laterally in the centre 
simulating a valvular appearance. 
Total length 7°5 mm. ; length of tegmina 6 mm. 
Amazons (H. W. Bates). One example (Oxford 
Museum), 
This somewhat remarkable species is most nearly allied 
to A. flabellata, Sss. and Zhnt.» The unique example was 
labelled in Walker’s handwriting “ Riatia sp.” ; the genus 
Riatia (type R. pallicornis, Wk.) 1s too close to Anaplecta 
to be entitled to separate rank. 
Genus ANAPLECTOIDEA, nov. 
Differs from Anaplecta, Burm., in the branching of the ulnar vein 
of the wing. Elliptical, smooth, shining ; vertex of head reaching 
anterior border of pronotum ; eyes less remote than the insertions 
of the antenne ; pronotum transversely elliptical. Tegmina with 
marginal field very broad occupying almost half the total breadth. 
Ulnar vein multi-ramose, anal vein deeply impressed, axillary veins 
obsolete. Wings with numerous costal veins, medio-discal field 
crossed by numerous transverse venule, ulnar vein multi-ramose, 
the veins being giyen off towards the dividing vein, apical area small. 
