352 BRITISH ORIBATIDiE. 



and coxfe of the two hind pairs are enlarged but flat- 

 tened internally so as to slip along the sides of the 

 abdomen. The first pair of femora are usually more 

 or less pedunculate, and all are often provided with 

 blades (PI. XXVII, figs. 8, 9 ; PI. XXIX, figs. 8, 14, 

 &c.). The genuals are usually small ; the tibiae, par- 

 ticularly those of the two hind pairs of legs, often long 

 and slender (PI. XXIX, figs. 1, 11) ; those of the front 

 legs are sometimes almost globular, with short peduncles 

 (N. monilipes, N. splendens, &c.). Nicolet, judging from 

 the three species which he knew, considered that all 

 members of the genus had tridactyle and homodactyle 

 claws ; a wider knowledge shows that some species are 

 monodactyle and some tridactyle ; and that of the 

 latter some are homodactyle and some heterodactyle. 

 According to Xicolet's view this would probably have 

 necessitated the creation of two new genera, but, as 

 before stated, I am not able to coincide in this. 



Notogaster generally much arched, rarely with 

 any marking beside the dotting or pitting; it is 

 almost always furnished with two rows and a border 

 of hairs ; these may be exceedingly fine and small 

 (PL XXXIII, fig. 10 ; PI. XXXII, figs. 7, 12), or may 

 be large and setiform (PI. XXIX, fig. 11), or may be 

 large and serrated (PI. XXIX, fig. 1). 



Genital and Anal Plates. — These vary considerably 

 in different species both in size and position ; in some 

 the plates are small and at opposite extremities 

 of the ventral plate {N. hipilis PI. XXVII, fig. 3 ; 

 N. splendens, PI. XXXIII, fig. 12, &c.). Sometimes 

 they are much larger and closer together {N. serrata, 

 PI. XXIX, fig. 3, &c.). Sometimes they may occupy 

 almost the entire length of the ventral plate and be 

 close together {N. lanceolata, &c.). 



The Tracheal system is fully developed. 



The Caeca of the ventriculus are usually short and 

 round. 



The Ovipositor is extremely long, with the cusps 

 long and delicate, and the corrugations beautifully fine 



