Vol. Xxii] ENTOMOLOGICAL NEWS 149 



decidedly so, and becoming oblique at apex ; lateral gills triquetral, the 

 median, flatter and with a longitudinal carina upon either face. 



General color yellowish green ; some narrow longitudinal streaks 

 and minute spots in pairs on the top of the head, and a broad black 

 band extends from the base of the antenna to the thorax, including 

 the eye. There are indications of paler transverse bands upon the 

 gills and of subapical rings on the femora. 



This species differs markedly from those hitherto known* 

 in the form of the middle caudal gill-lamella, its greater brev- 

 ity and apical widening and obliquity being very noticeable. 



Anisopleura comes Hagen (supposition). (Plate V, figs. 1-3.) 



Hagen, C. R., Soc. Ent. Belg., Vol. 23, p. Ixvi, 1880, "Euphaea 

 dispart" 



Carleton, M. C. Z., No. 301, India. 



Length 21 mm., gills 9 mm. additional, abdomen n mm., hind fe- 

 mur 5 mm., width of head 5 mm., of abdomen 4 mm, 



Body rather stout. Coloration lost, owing to action of alcohol. 

 Antennae rather stout, 7-jointed, the relative lengths of the segments 

 being as i :i :i.3 :i :.8 :.6 :.5. Mandibles conspicuously biramous, the 

 outer branch about as large as the inner projecting forward at the 

 sides of the mouth outside as in generalized members of the Ephe- 

 merinae. Labium very similar to that of Bayadcra shown in fig. 6 of 

 plate V. Its lateral lobe differing slightly in the proportions of the 

 end hooks, fig. 3. 



Legs stout, thinly fringed with hairs along the superior longitudinal 

 carinae. Wing-cases reaching the middle of the 5th abdominal seg- 

 ment. Abdomen slowly tapering posteriorly, bearing simple paired 

 filamentous gills at the sides of the 2nd to the 8th segments. Caudal 

 gills (middle one wanting) inflated at base with a ciliate superior 

 carina, tapering to a long slender tail-like apex nearly as long as the 

 swollen basal part and clothed with long soft hairs. 



The only clue to the identity of this nymph is found in the 

 venation of the developing wings, which are, unfortunately, 

 but poorly preserved. These things are evident. Ante- and 

 post-nodals in the fore wing are 14 and 16 respectively, and 



*Dr. Fr. Ris has recently characterized the nymphs of the two 

 commonest European species (Die Siisswasser-fauna Deutschlands, p. 

 47, 1909) and I distinguished two of the commonest N. American forms 

 in 1903 (Bull. 68 N. Y. State Museum, P. p. 222). This is the fifth species 

 cf Calopteryx nymphs to be made known. 



