486 Mr. C. Fuller 07i some S'pecics of 



well, the study of wliicli enables me to establish, somewhat 

 at the expense of Mr. Maskell's genus Cadostoma, a genus 

 of six numbers. 



1. Callipa'ppus iveshvoodii, Guerin-Meneville. 



2. Cani]K(p2^n.s australis, Maskell. 



{Ccelostoma australe, Maskell, 1890.) 



3. Calli2mp2Jus immanis, Maskell. 



{Coilostoma immane, Maskell, 1891.) 



4. Callipappus ruhiginosus, Maskell. 



(Ccelostoma o'tchiginosmn, Maskell, 1893.) 



5. CallipapjnLS, farinosus Full. 



6. Callipappus, hufo Full. 



Having a large amount of material at my disposal I 

 have been able to examine the three West Australian 

 species fairly thoroughly, and have found in their structure 

 a most interesting and distinctive featuT*e — the complete 

 intussusception of several of the abdominal segments of 

 tlie mature $s, in the form of a marsupium, in which the 

 eggs are laid and incubated. This feature could have only 

 been overlooked by the former students of the genus for 

 want of material, and Signoret, though he figures five 

 abdominal segments, says that only two are visible. 

 Maskell in placing the three species mentioned above in 

 his genus Ccelostoma, must have been guided by that part 

 of Signoret's definition where he says : " Rostrum and 

 mouth-parts between the bases of the anterior legs, and a 

 little below their insertion." Maskell found that the 

 insects sent him from Australia were without mouths, and 

 that enlarging the characters of Ccelostoma placed them 

 therein. The members of the genus Callipap)pus are how- 

 ever mouthless, and one must conclude that Signoret has 

 referred to the small buccal nipple or obsolete mouth 

 sometimes seen, as the rostrum ; for it is evident that he 

 could not have made out the rostrum, as he says that he 

 was unable to see or study the genital orifice and anus for, 

 "notwithstanding a maceration of several days, the tegu- 

 ment was not rendered transparent." 



Characters : — ^ , AuLeiiiito 10- ur 11 -jointed, tapering from base to 

 apex : first 2 joints short, the rest longer. Eyes facetted. Abdomen 

 slightly lobed at the sides, the last segments bearing a caudal brush 

 of long, glassy filaments. Penis very long. Legs long ; tibia longer 

 than tarsus, the latter bearing a single claw. Balancers large anrl 

 wide, with a hook to one side of tlie e.vtremity. 



