into two Classes. cci 



gated approximate 3-jointed labipalpi, atrophied prothorax, four nearly 

 equally-sized wings, the lower pair smallest, their nervures following 

 the formula of Panorpa rather than of Hemerobius, and covered with 

 a white powder : the legs simple, of moderate size, and the tarsi 5- 

 jointed, with the penultimate joint bilobed. There are several specific 

 names in addition to those mentioned above, as Aphidiformis, Psoci- 

 formis, &c, but whether or not they represent species, I am quite un- 

 able to say. For this little group I propose the name of 



Coniopterycid^e, Newm. 



Obs. 1. — The genus Psychopsis, at present consisting of the single 

 species, Psychopsis mimica, a most lovely insect from New Holland, 

 which has every appearance of the clear-winged Pieridae among but- 

 terflies, must for the present be placed with the Hemerobiidae. 



Obs. 2. — Other forms of Hemerobiina remain to be characterized : 

 it is possible that Aleyrodes may find its affinities with Coniopteryx 

 rather than with Aphis. 



Characters of Corydalina. 



Larva hexapod, active, aquatic, with short slender antennae, corne- 

 ous toothed mordent mandibles, soft flashy body, and a series 

 of remarkable articulated false legs, a pair of which is attached, 

 as in the larvae of the Lepidoptera and the Tenthredinina, to each 

 segment of the abdomen ; these are evidently natatory organs, 

 and although all authors seem to agree that they are also respi- 

 ratory organs, like the external branchiae of the Ephemerina, 

 this must not be taken for granted : the appendages in the two 

 groups are totally different ; in the Corydalina being slender, 

 cylindrical, quinque-articulate antennaeform organs, without any 

 external indication of respiratory functions : although aquatic, 

 this larva is able to live out of water, remaining unchanged for a 

 long time in its earthy cell, without any indication of that shri- 

 velling which so quickly attends the respiratory apparatus of the 

 Ephemerina, causing speedy death : that these organs are con- 

 nected with respiration is quite possible, but the premises from 

 which this inference has been drawn are insufficient : there is a 

 single hairy caudal process. 



Pupa strictly necromorphous, perfectly quiescent, but capable of 

 some motion when touched or irritated, it changes in a spheri- 

 cal earthen cell, formed with care by the larva in the banks of 

 streams ; the head and tail are bent, probably like those of the 

 two preceding groups, to accommodate the insect to the re- 

 stricted limits of the cell. 



