80 HARVEST-BUGS. 
occur on the abdominal viscera, in the muscles and beneath 
the skin. 
C. HARVEST-BUGS: JIGGERS. 
(Trombidiide). 
These mites are soft, bright-colored, and more or less 
hairy. They possess a conical sucker composed of two 

Gi} b CN c 
Fig. 45.—Trombidium locustarum; a, female laying eggs; b, young larva; c, 
fresh egg; d, d, egg shells. Enlarged. After Riley. 
hooked or styliform chelifers hidden in a tube formed by the 
lower lip and the joined maxilla. The palpi are usually 
large, the second joint is longest, while the last bears a pe- 
culiar appendage which can be used as a finger and thumb. 
The eight legs have five orsixjoints, usually with two hooks. 
Two eyes are often present. The six-leg- 
ged larve lead a parasitic life, and not 
alone upon insects and spiders, but also 
upon warm-blooded animals, which they 
torment, and where they can produce 
itch-like sores. Thelarvze of some of the 
species of Zrombidium are, however, ex- 
housefly. Enlarge d. ceedingly beneficial; for instance the 
ae young of the locust-mite check most 
effectually the increase of the Rocky-mountain locust. An- 
other small and red mite is frequently found upon our com- 
mon house-fly, where it becomes the torment of our tor- 
menter. May it prosper! In figure 45 is shown a female 
Trombidium laying eggs, and a young larva; in fig. 46, 

