536 
THE STUD Y OF INSECTS . 
family; the antennae are about half as long as the body; 
the prothorax is nearly square, and usually has a wide, thin 
margin, which is slightly turned upwards at the sides. 
Fig. 644. 
Family Erotylid^e (Er-o-tyl'i-dae). 
The Eroty/ids ( Er-ot'y-lids ). 
The members of this family are usually of moderate or 
small size; but some species are quite large, measuring three 
fourths inch or more in length. Some of our more common 
species are conspicuously marked with shining black and red. 
To the genus Megalodachne (Meg-a-lo-dach'ne) belong 
two common, large species, which are black, 
with two dull-red bands extending across the 
wing-covers. M. keros (M.he'ros) (Fig. 645) is 
two thirds of an inch or more in length. M\ 
fasciata (M. fas-ci-a'ta) is about half an inch 
long. 
The genus Languria (Lan-gu'ri-a) includes 
long, narrow species, which resemble click-beetles in form. 
Fig. 645. 
