THE CANADIAN ENTOMOLOGIST. 145 



O. Saiindersii, Walker. List. Neuropt. Br. Mus., p. 531. 



O. Saundersii, Wood-Mason. Contrib. Embid. Proc. Zool. Soc. 

 Lond., 18S3, p. 628-634, pi. Ivi., f. 1-5. 



O. Saumfersii, Conry. Ascension Isl. Zool. Ann. Mag., N. H., 1881, 

 vol. viii., p. 346. 



Embia Latreillii, Ramb. Neuropt, p. 312-2. 



E. Latreillii, Lucas. Ann. Soc. Ent. Fr., 1883, vol. iii. Bullet, p. cvi. 



The species was described fifty years ago by Westwood : " Lutescenti- 

 fuscescens, incisuris abdominalibus dilutioribus, alis pallide fuscescenti- 

 bus, vittis 5 angustissimis albis longitudinalibus inter nervos longitudinales 

 positis." The only known specimen from Bengal, formerly in W. Saunders' 

 collection, belongs now to the British Museum. Burmeister, who had not 

 seen the specimen, changed the color to *' testaceofuscescens," which was 

 copied by Walker, though the type was accessible to him. Rambur 

 remarks that he had separated his E. Latreillii w^iih. i8-jointed antennge 

 from O. Saundersii with ii-jointed antenna, only for this difference. I 

 believe that McLachlan is perfectly correct in assuming the antennse of 

 the type imperfect and the identity of both species doubtless. (Journal 

 Linn. Soc. xiii., p. 379.) He remarks, 1. c, '^ in some examples there is a 

 slender spiniform process between the articulate side processes (append- 

 ages) ; in O. Saundersii this spiniform process has a small tooth before 

 the apex on the lower side. I do not see the process in all the examples, 

 hence it may perhaps be sexual, and possibly is the intromittent organ." 

 (McLachl.) 



The S alcoholic specimens before me show all this process on the right 

 side, but on the left side is a similar process, which in dry specimens is 

 not well visible. Between both the last ventral segment is protruded 

 asymmetrically to the left in a bottle-shaped cone, with a round aperture 

 on tip. This is as in some Perlids and Phryganids the opening of the 

 ductus ejaculatorius, representing the intromittent organ ; the spines or 

 similar organs have the purpose to open the female valves and to keep 

 them in place during copulation. In O. Saundersii these spines viewed 

 from beside are small bands, rounded on tip, with a small hook outside 

 before tip ; this hook is wanting on the left spine, which is also in other 

 species more or less asymmetrical. 



McLachlan has not described 0. Saundersii, but he notes (by O. 

 insularis) that the body is testaceous. 



