ENEMIES OF APHIDES. 267 



deflexed, and when threatened feign death by bending the anten- 

 nae under the body. 



The sub-family consists of but the single genus Coniopteryx, 

 which comprises three species only, as given by Maclachlan. 



DESCRIPTION OF PLATES XII. and XIII. 



n 



>? 



Plate XII. 



Illustrations of Aphidivorous Larvae of the Neuroptera Planipennia, 



fam. Hemerohiinre. 



Fig. 1. — A group of nine stalked eggs on oak leaf. Taken shortly 

 after laying by the lace-wing fly (Chrysopa perla) (3-in. objec- 

 tive). 



,, 2. — One of the eggs the day prior to hatching (twelve days after 

 oviposition), showing young larva within (1-in. objective). 



3. — Same eggs as Fig. 1, showing larvae escaping and the empty 

 eggs, split lo7igitudinally. 



4. — Larva at four or five hours after hatching. At this age it is 

 fairly transparent, very active, and will readily attack aphides 



5. — One of the long palpi of head ( ? maxillary palpi), showing a 

 structure resembling that of the antennae of Aphis, and ter- 

 minated by a long fine bristle. 



6. — Mandible, showing hollow channel and the maxilla within, 

 which works up and down in the groove. The latter is seen to 

 contain food. 



,, 7. — Extremity of mandible, showing the minute cushion with 

 ^exceedingly fine spines, by w^hich it is terminated ; also, the 

 long thin bristle at apex, and within, the extremity of the 

 - sucking maxilla. 



,, 8. — The eye, seen sideways. The eye in the larva consists of^ 

 several ocelli, grouped together. 



,, 9. — The claw and appendages, showing at the extremity of the 

 tarsus the double hooks with strong bristles, and extending 

 between them the slender tendinous process, carrying at its 

 extremity the suctorial (?) pad, which has in its cup-shaped 

 hollow several minute teat-like organs, which are probably the 

 outlets of glands, yielding some secretion which lubricates 

 the pad. 



Plate XIIL 



Fig. 1. — Larva of Chrysopa perla, nearly full grown, with an aphis in 

 its mandibles. 



)) 



2. — Imago of same (female). 



