112 



BITING-LOUSE OF SHEEP. 



possesses on the first seven segments dark margins. Length 

 1.7mm. 



This insect has not as yet been reported from Minnesota, 

 but as the interest in sheep-husbandry is becoming greater 



Fig. 82. — Bitinpr-lovise of sheep; 

 egg, soon after being laid; a, cap; 

 6, where the cap is joined to the 

 egg. Greatly enlarged. After Cur- 

 tice. 



Fig. 83. — Biting-louse of sheep, showing 

 head with mouth-parts from ventral side; a, 

 n, antannjE; h, b. continuation of dorsal su- 

 ture; c, c, ventral suture; r/. d. mandibles: e, 

 maxilla; showing through skin; f, labrum. 

 Greatlj- enlarged. 



every year it is wise to look out for this parasite, which can 

 not be as easily destroyed as manj^ others, on account of the 

 longer w^ool of the host. Wherever it occurs it causes great 

 annoyance to the infested animals, which try to stop the 

 continuous irritations by as constant scratchings and bit- 

 ings. Those not familiar with the true sheep-scab are very 

 apt to mistake this one for the other. During the time of 



Fig. 84. — Biting-louse of sheep, anterior leg; a, coxa; b, 

 trochanter; c, femur; cl, tibia; e, tarsi and claws, the 

 latter grasping a hair. Greatly enlarged. Affer Curtice. 



clipping the sheep close attention should be paid to these 

 parasites. Fig. 80 shows a male of this species, fig. 81 the 

 female, and figs. 82, 83, 84 show the egg, head and front leg 

 of this species, as w^ell as the anatomical details. 



