INSKCTA AI'TKRA. 5 



Spring and Catch. .Most of lh<> specimens examined show no trace ot' these 

 structures, hut in two the appearance drawn in Jig. 11 can he plainly seen. Tin- s|nin- 

 (fig. I 1, .) is clearly in a vestigial condition, its niannliriiini hcinu; merged in the ventral 

 region of the fourth ahdoniiual segment, while the combined dens and miicio terminate 

 in a blunt, rounded knoh. 



The catch (retinaculum) is represented by a pair of .small rugose prominences 

 (fig. 11 /) on the third abdominal segment. 



Anal Spines. The anal spines are nearly as long as the foot-daw, slightly and 

 evenly curved (figs. 11, 12). They are situated on short, contiguous papillae. In all 

 the specimens examined the spines are slightly asymmetrical (fig. 12). bur this is 

 probably due to the position of one having been slightly shifted. 



linn', 



linn;. 



I'.ioi;. 



I'.ni2. 



REFERENCES. 



('. BORXER. Das System der Collembolen ncbst Beschreibong nener Collembolen dee Hamburger 



Datnrb.iBtoriflcb.en Museums. 2 IViheft zum Jnln-h. <l<-r //-////A///-//, n-ixx/'/ixi-/,. .I//*/,////.,/. x\iii.. 



I'.Hiil, pp. 147-lss. 

 (i. II. CAKPEXTKU. " Insecta Aptera," in Ifr/iurt mi Collections, Voyage of Sonllimt Cross, 



pp. 221-15, pi. xlvii. London (British Museum), l!i"2. 



Scottish National Antarctic Expedition. 'Scotia' Collections. Collenibola 



from the South Orkney Wands. Prof. Royal ,V. Eiiinl>., xxvi., I'.ini;, pp. 1 7:;- Is:;, pis. 1-2. 

 E. WAIIIJIUKX. Antarktische und Bubantarktiflche Collembollen jrcsamnielt von dcT sclnvc(li>rln-ii 



Siidpolarexpedition. Wix*e/ti'/t. Enjclm. ilrr <S''7/w/. >s'/vv/yy/y/^/-c.<y7////v//(. r.mi ;;. V ol. v.. 



ll)ni;. pp. 1-22, jils. 1-2. 

 V. WILLEM. Colleiiilmles : RemiUittx iln !"//"//'' '/'' - s '- )'. 



Si ii i/fijiqtii'x. A nvers. I'.ioi. 



en 



. IMi'.i. 



EXPLANATION OF PLATE. 

 Qomphiocephalus hodgsoni. 



Vl<:. 1. Left feeler with part of head, dorsal aspect; ". silli-apical. depressnl sense-organ ; 6, Sensory 

 bristle; (/, sensory spines on third antenna! scirnn-nt : <, pust-antmiuil or.u'an : ./'. dt-iitiforin 

 ceplialic sensu-orgiin ; e, e", variations in form of post-antrnnal organ from other specimens. 



Fn;. 2. Right feeler, lateral aspect of extremity ; n and </ as in fi_ r . 1 : c, :i]iical, proirusilile gense-Olgan. 



Fn;. :!. Left maudilile. seen from inner aspect. 



Fn;. 1. Left mandible, dorsal aspect. 



!>;. ."). Kight maxillula. showing teeth and molar area. 



Fid. (!. Left maxilla ; .v. siipes : //, galea : /, lamellae ; //. palp. 



Fir,. 7. Second pair of maxillae forming labium. 



Fiii. s. Labnuii. 



FlG. 0. Right hind leg, showing claw, vestigial empndiuni, and leiieni hairs mi foot. 



Fin. lo.. -Ventral tube on first aMi'initial seiiiin/nt, seen from right side. 



Fn:. 11. Part of bind abdominal segments, showing anal spines, and vestigial spring (.) and raidi 

 lateral view. 



Fn:. 12. Tip of abdomen, witli papilhe and anal spines ; postern-ventral view. 



All figures are magnified Coo diainet'T>. 



I. 2 





. 



