220 Mr. F. W. Edwards on 



Coi'ynoneura innupta^ sp. n. 



Though this species is not at all uncommon in the Letch - 

 ■oorth district of Hertfordshire, it appears not to conform to 

 any of the published descriptions of European species ; it 

 may be diagnosed as follows : — 



? . General colour bright yellow, /few/ black behind ; face 

 brownish yellow ; palpi yellow ; antenure six-jointed, basal 

 joint black, joints 2-5 yellow, oval, not quite tw-ice as long 

 as broad ; last joint somewhat darkened, pointed, more than 

 three times as long as broad. Thorax yellow; mesonotura 

 with tiiree rather widely separated black stripes, the middle 

 one extending from the front margin halfway to the scu- 

 tellum ; base of scutellum, apical half of postnotum, also 

 the mesosternnm blackish. Abdomen yellow ; the tergites 

 rather broadly blackish grey towards the base. Legs pale ; 

 extreme tips of femora, tibiae, and tarsal joints rather indis- 

 tinctly darkened ; front tibia about 1*7 times the length of 

 the metatarsus. Wings clear ; R extending very slightly 

 beyond the middle of the wing ; Cu forking noticeably 

 beyond the tip of R. 



Length 0*9 mm. 



C. innupta must evidently bear a close general resemblance 

 to C. scutellata, Winn., and C. pumila, Wulp (both of which 

 are unknown to me), but these two are said to have the 

 scutellum yellow at the base instead of the apex, and there 

 are some other points in the published descriptions which 

 seem to indicate that our insect cannot be the same as either. 



In the autumn of 1917 I reared a few females of this 

 species from the same pond from which I had obtained 

 Chironomus clavaticrus. Again, in the spring of 1918 Cory- 

 noneiira larvse apj.eai-ed in a breeding-jar for mosquito-larvae. 

 These latter Mere collected in a temporary puddle in a copse 

 at Arlesey, Beds, and were supplied with dead leaves and 

 water from a ditch (also temporarily fullj in my garden at 

 Letchworth. I do not know from which locality the Coryno- 

 neura larvae originated. I have also swept female specimens 

 from vegetation at the lakeside at Radwell, Herts. 



From the larvae in this jar, which was kept closed the 

 whole time, about fifty specimens emerged in the early part 

 of June, all of which were females ; probably they were the 

 offspring of a specimen which hatched unnoticed earlier in 

 the year, since the material was collected early in April. 

 Some of the pupae were isolated, and both the specimens 

 \Uiich hatched from them and the others in the main recep- 

 tacle deposited egg-masses which produced larvae about 



