CECROPS. 



male, and is covered by this lamellar plate entirely, but 

 in the female it is very large, nearly half the size of the 

 whole body. It resembles a large buckler, swollen out 

 laterally, and covers the whole abdomen. The pos- 

 terior margin is lobed at the corners, and notched in the 

 middle. 



The abdomen is very small in the male, but in the 

 female it is of considerable size, two-lobed, and notched 

 posteriorly. The caudal appendages are very small, of 

 an oval form, and have three or four short hairs springing 

 from their inferior margin. 



The antennae are very small, and consist of two shorl 

 articulations. The mouth-apparatus resembles closely 

 that of the preceding genus. 



The foot -jaws are three pairs. The first pair is of 

 considerable size, consisting of two stout joints, and a 

 terminal, strong, sharp claw, deeply tinged with black. 

 The second pair is much smaller ; consisting also of two 

 joints, and two terminating claws, one much smaller tlia.ii 

 the other, and both of the same colour as the rest of tin 1 

 body. The third pair is much the largest, and exactly 

 resembles in form and structure the first pair. 



The feet are four pairs. In the male they are all small. 

 The first pair consists of two branches, of unequal length, 

 arising from a common basal joint, of moderate size. 

 Each branch is composed of two short joints, the last of 

 which gives off three terminal setae. The internal branch 

 is considerably the smaller of the two. The second and 

 third pairs have the same structure, only the basal joint 

 is in the form of a plate, extending across to each side, 

 while the fourth pair, in addition to its having this 

 plate larger, has the two branches composed of only one 

 articulation each, and this one broader and larger than in 

 the preceding. In the female, the first three pairs of feet 

 are formed as in the male, the first having a moderate- 

 sized basal joint, while the two others have the same 

 plate, of which the basal joint is composed, much broad* v 

 and larger. The fourth pair is very large in proportion, 



