232 



[September, 



Prothorax transverse, hardly broader than head, straight in front above, but 

 produced at eitlier side into a blunt process, the anterior edge of which is serrate, 

 and upon which is a number of hairs and minute points. Meso- and metathorax 

 transverse, each broader than the segment preceding it ; the first named, although 

 uncoloured, apparently partly chitinous. All the thoracic segments sparingly hairy. 



Legs : proportion of pairs (as to length) 13^ — 21 — 25|. The joints of the 1st 

 pair much dilated ; those of the 2nd pair slender, and thoise of the 3rd more so. 

 The coxpe, trochanters, femora and tibiis of all the pairs beset with rather numerous, 

 mostly long, hairs, a few on the hind tibise, as well as a few on the tarsi of same 

 legs, very long ; inner side of the joints of anterior legs armed with spines, of which 

 there are also a few on tibife and tarsi of 2nd pair. Femora of 2nd and 3rd pairs 

 on their inner side with a row of sliort spines or points ; the latter pair have also a 

 number of spines on their outer side. 



Abdomen : Ist segment broadest of all, with the usual dorsal and lateral pro- 

 cesses, the latter being finely ciliated along their anterior margin ; from the 1st 

 segment the body very gradually tapers, the last segment being conspicuously nar- 

 rower. Lateral fringe not present ; it is represented on 2nd to 8th segments by a 

 row of minute and rather widely separated hairs or spines. Last segment, above, 

 terminates in a partially hard plate, whose curved edge carries a few hairs ; beneath 

 this are the anal limbs, consisting of a stout proximal joint produced above to a 

 blunt point, and an inferiorly placed smaller distal joint, both joints strongly haired, 

 the projecting tip of the first named joint bearing two or three spines of extraordi- 

 nary length and strength. The claw, in addition to the usual large hook and the 

 smaller supplementary one, has as well a kind of spur. There do not appear to be 

 any respiratory filaments; the margin of segments four to eight inclusive in the 

 pleural region bears on either side a short conical process, which may repi'cscnt an 

 aborted thing of the kind, but in it there is little or no trace of trachea). 



Colours : head and prothorax bright reddish ; legs and anal claws yellowish ; 

 rest of body white, sometimes with a pale yellow tint. 



Nymph : slender ; head transverse ; labrura nearly semicircular, with a number 

 of strong hairs ; mandibles long, slender, tapering, falcate, serrate on inner edge. 

 Middle pair of legs with fringe reduced to a few hairs.* Wing-cases acute, reaching 

 end of 5th segment or a little beyond. 



Abdomen : 3rd to 6th segments inclusive above with an anteriorly placed small 

 oval plate at either side, each plate bearing a single backward directed hook ; 5th 

 segment, in addition, with two posteriorly placed plates, the liind margins of which 

 bear two (probably sometimes three — the difference may be sexual) forward-directed 

 hooks. The end of abdomen is beset with numerous fine points and is rather hairy. 

 Appendages very short ; above and on their inner face beset with hairs ; seen from 

 side they are at first deseendent, then upturned ; apex bifid, the acute tips slightly 

 inturned, the superior branch being the longer. Near the origin of the appendages 

 are two small, flat, almost circular plates, covered with minute points. There is no 

 trace of respiratory filaments as far as I can see, nor of a lateral fringe. There also 

 seems to be no external trace of the ventral tooth so conspicuous in the perfect 

 insect. 



* Hardly to be called a fringe. But great care is required in determining the extent of these 

 fringes, as the hairs arc apt to Ijoeome matted together and adpressed to the legs. At page 39 I 

 unfortunately lai(i .stres.s on the absence of fringes in the nymph of Tmodes aureola, which a 

 caieful examination of more material proves to have a distinct fringe of short hairs. 



