lOO ECONOMIC ENTOMOLOGY 



Lace-wings are delicate pale-green insects with finely veined wings. 

 The larvae have large jaws, and owing to their habit of feeding upon 

 aphids are called aphis-lions. The pupae are 

 enclosed in a white cocoon of silk (Fig. 57). 



Ant-lions are predaceous larvae, which lie 

 in wait for their prey at the bottom of funnel- 

 shaped pits. The adults have narrow delicate 

 wings. 

 {Chrysol''a)7%\St^rl Scorpion-flies (Mecoptera) —Scorpion-flies 

 duced. {After Folsotn.) have their head prolonged into a beak. The 

 larvae live in the ground and are caterpillar- 

 like. Both larva and adult are carnivorous. 



ORDER MALLOPHAGA (BITING LICE) 



Chief Families and Genera: 



A. Antennae filamentous, exposed, 3- or 5-jointed; maxillary palpi absent; 

 mandibles vertical; middle and hind segments of thorax fused. 

 B. Antennas 3-jointed; tarsi with a single claw; infesting mammals. 

 ■ — Trichodectidce. 



Genus: Trichodedes. 

 BB. Antennae 5-Jointed; tarsi with two claws; infesting birds. — Philopteridce. 

 Genera: Docophorus, Lipeurus, Nirmus, Goniodes, Goniocoles. 

 A A. Antennae clavate or capitate, concealed, 4- jointed; maxillary palpi 4- 

 jointed; mandibles horizontal; middle and hind segments of thorax sepa- 

 rated by a suture. 

 . B. Tarsi with a single claw; infesting mammals. — Gyropida. 

 Genus: Gyro pus. 

 BB. Tarsi with two claws; infesting birds. — Liotheidce. 

 Genera: Menopon, Trinoton. 

 (Consult Bull. 5, n.s. Divison of Etomology, U. S. Dept. of Agriculture, by Osborn) 



Although most commonly found on poultry, Biting Lice some- 

 times infest the larger domestic animals. They do not suck blood 

 but feed on the rough parts of the skin and at the base of hairs and 

 feathers, causing considerable irritation. Young chicks frequently 

 suffer severely from their attacks. 



The most abundant species found on fowls is the common hen 

 louse (Menopon pallidum), a pale yellow active insect, 3^5 inch long, 

 with six legs (Fig. 58). 



The eggs or "nits" are oval objects attached to the vanes and 



