Vol. xxii] ENTOMOLOGICAL NEWS. 343 



metathorax ; mentum widened to the bases of the rather short lateral 

 lobes ; median lobe somewhat prominent, completely divided by a 

 nearly closed median cleft which descends below the level of the 

 base of the lateral lobes and widens at the bottom to an oval en- 

 closure. Lateral lobe with a long and strong movable hook, and 

 two stout incurved hooks on the end, the outer hook being simple 

 and half as large as the inner. No raptorial setae. 



Legs short, longitudinally carinate, the carinae beset with minute 

 prickles. Wings reaching the base of the fourth abdominal seg- 

 ment. 



Abdomen cylindric. becoming compressed and slightly narrowed 

 on segments 9 and 10, with a dorsal ridge on 10. slightly excavate 

 at the apical margin. Segments 5-9 are laterally carinate, the 

 carinse spinulose serrate, ending in sharp lateral spines, the one 

 on segment 5 rudimentary. Gills obovate, widest beyond the middle, 

 and abruptly rounded on tip, each jointed on a distinct basal segment 

 that is about as long as high, the middle gill about a tenth shorter 

 than the other two. External genitalia of both sexes remarkably 

 well developed. 



The identity of this nymph is not disclosed by the imperfectly 

 preserved venation. Ante and post-nodals are 2:16 and 2:14 in fore 

 and hind wing respectively. The hind margin appears to be "petiolate" 

 from the level of the cross vein opposite the inner end of the 

 subquadrangle, although this is not very clear. The stigma is nearly 

 four times as long as wide, slightly convex both before and behind, 

 strongly braced at its inner end. and there are two cross veins in 

 the space behind it, placed at the first and second thirds of its length. 

 Vein M2 arises opposite the fourth cross vein beyond the nodus, 

 is widely separated from vein Mi opposite the outer end of the 

 stigma with four cell rows between (three of them below vein 

 Mia) and strongly convergent with vein Mi to the wing margin. 

 In the apical costal space beyond the stigma there are about ten 

 long simple cross veins in the fore wing, and somewhat fewer, dis- 

 tinctly forking ones in the hind wing. The arculus is in line with 

 the second antenodal cross vein, but inclines outward to meet the 

 inner angle of the rather obliquely placed quadrangle. The latter 

 is trapezoidal, its front margin much shorter than the others, being 

 about half as long as the outer side and hardly more than a third 

 as long as the hinder side. The branches of the cubital vein di- 

 verge strongly at their departure from the quadrangle, and then ex- 

 tend parallel. 



These details should be sufiRcient for the determination of 

 the genus at least, if one had before him representatives of 

 the Indian fauna. I know no adult Agrionid with venation 



