24 NEUROPTERA. 



The description is made from an English male, and fron-. 

 Prussian specimens which I have compared with the types. 



Stephens' description of E. lutea suits the female well, but 

 the length of the caudal filaments is somewhat too little. 



I have referred Stephens' E. marginata as the male ; but 

 he describes the head and thorax as too dark, viz. " black," 

 and the caudal filaments as short as those of the female. A 

 further comparison of these types would solve these doubts. 

 From a comparison of the types it would also appear that the 

 male of B. costalis, Stephens, should be referred to E. lutea. 



3. B. LONGiCAUDA, Stephens, 63, 3, S ; 2 imago. 



JB. suhfuscay Stephens, 64, 5, 2 imago; B. costalis, 

 Curtis, Phil. Mag. 120, 7 ; Stephens, 64, 4, only 2 

 (the $ belongs to jB, lutea) ; B. cerea, Pictet, Ephem. 

 183, 10. tab. 23, f . 2 ; $ imago. 

 Imago. Ochreous-yellow, on the hind part of the head 

 is a black streak on each side near the eyes ; thorax 

 shining ; the joints of the abdominal segments darker ; 

 caudal filaments pale, the joints annulated with black ; 

 legs yellow, the anterior a little darker ; tips of the 

 femora brown. Wings hyaline, costa yellow with 

 strongly marked black transverse veins ; apex of the 

 marginal field with straight transverse veins; egg- 

 valve rounded, ventral plate of the last segment cir- 

 cular, not incised. 

 Length of the body 2 5.^ lines; expansion of the wings 



2 18 lines ; setae 2 12^ lines. 



Habitat Hertford, in June. 



The description is made from a solitary English female, 



which, however, has not been compared with the types. 



B. cerea of Pictet doubtless belongs here ; the black streak 



on the hind part of the head, which is not mentioned in the 



