428 ]\Ir. R. M'Laclilan on 



Pseudo-Neuroptera. 



Fani. Ephemeridse. 



Ephemera pictiventns, sp. n. 



$ sulimago. Head and thorax above opaque whitish, more 

 tinged with yellowish beneath. Eyes black, and they are 

 connected by a black band, Antennoe having the second 

 joint black, those succeeding slightly paler. A black line 

 extends on each side along the thorax from below the eyes to 

 the root of the anterior wing, and on each side of the meso- 

 thorax there is a large round-oval black spot below the black 

 line. Legs yellowish Avhite ; anterior femora with a dusky 

 line internally, and dusky externally towards the apex ; the 

 corresponding tibiae and tarsi dusky, the latter almost blackish, 

 intermediate and posterior tarsi having the terminal joint 

 dusky. Abdomen yellow, each segment above having a 

 complete crescentic black marking, becoming more elliptical 

 on the apical segments ; venter with an oblique black streak 

 on the sides of each segment, becoming straighter and more 

 parallel on the antepenultimate and penultimate. Setje 

 black, the two outer with yellow basal joint ; clothed with 

 fuliginous hairs, which become longer and more dense on 

 approaching the apex. 



Wings opaque whitish, the costal margin as far as the 

 radius tinged with yellowish. Neuration black, but yellow 

 at the extreme base ; the anal reticulation ])ale. 



$ imogo. Head and thorax shining yellow ; a broad black 

 band connecting the eyes. Antennas having the second and 

 third joints black, the bristle whitish. Pronotum with a 

 broad oblong black spot on either side. Mesonotum shining 

 fuliginous in front, a black line in the sulcus that bounds the 

 raised median portion ; a black spot on the sides contiguous 

 to the posterior angle of the pronotum ; an elongate spot on 

 the sides above the root of the anterior wings ; a curved 

 blackish streak on the sides above the intermediate legs, 

 appearing as if trifid or quadrifid posteriorly, and there are 

 blackish markings above the posterior legs. Legs yellow ; 

 anterior femora blackish on the edges, the tibiae and tarsi 

 wholly black ; intermediate and posterior tarsi dusky. Ab- 

 domen yellow, with black crescentic markings above as in the 

 subimago, but broader and more intense, and the sides of each 

 dilated and connected with the oblique black lines on the 

 ventral surface, which are alsn more intense and complete. 

 (iSette wanting.) 



