ORTHOPTERA. 



15 



inch long and when in perfect condition is clothed with silvery-grey 

 scales. It is common in warehouses, clothes presses, and sometimes 

 does considerable mischief to old prints, books, etc., by gnawing 

 away the surface. 



An allied insect is Th&rmophila fumorum, of which a drawing is 

 exhibited. It is about half-an-inch in length, of a yellowish cream 

 colour, prettily ornamented with grey and black scales. It is not 

 often seen, but occasionally occurs in great numbers in London 

 bakeries, hence its name " Baker's Brat." 



Order ORTHOPTERA. 



In the second half of Case No. 31 the series of Orthoptera com- 

 mences. These are divided into seven families, the principal 

 characters of which are as follows : — 



A. 



Hind legs 



formed for 



running or 



walking. 



Orthoptera 

 cursoria. 



/ Legs attached 

 to the side 

 of the body 

 by small 



coxee. 

 (Fig. 12). 



Legs with 

 large, elon- 

 gate coxse. 

 (Fig. 13). 



Tarsi 

 3-jointed. 



Tarsi 

 5-jointed. 



Front legs 



formed for 



seizing. 



All the legs 



formed for 



running. 



Forficulid.e. 

 (Earwigs). 



Phasmidje. 



(Stick Insects). 



Mantid^. 

 (Mantids). 



BLATTIDiE. 



(Cockroaches). 



Hind legs 



formed for 



leaping. 



Orthoptera 



Saltatoria. 



Antennae 



long, 



thread-like. 



Antennae not 

 very long. 



Tarsi GRYLLiDiE. 



3-jointed. (Crickets). 



Tarsi Phasgonurid^. 



4-jointed. (Long-horned Locusts). 



LOCUSTIDiE. 



(Locusts and Grass- 

 hoppers) . 



Family Hemiherid2e. 



An insect of particular interest in this case is Hemimerus (1056), 

 a wingless insect found on a rat or " ground pig " (Cricetomys 

 ganibianus) and other small mammals in Africa. 



