INSECTA APTERA. 5 



Spring and Catch. Most of the specimeus examined show no trace of these 

 structures, but in two the appearance drawn in fig. 1 1 can be pLainly seen. The spring 

 (fig. 11, s) is clearly in a vestigial condition, its manul^rium being merged in the ventral 

 region of the fourth abdominal segment, while the combined dens and mucrcj terminate 

 in a blunt, rounded kuol). 



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

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



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

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

 the specimeus examined the spines are slightly asymmetrical (fig. 12), but this is 

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



REFERENCES. 



r.tOfi. C. Border. Das System tier Collembolen ncbst Beschreibung newer Collembolen des Hcamburger 



iiaturhistorischeu Museums. 2 Beiheft zum Jahrli. der Hamburg, irissensch. Ansial/cii, xxiii., 



lOOU, pp. 147-188. 

 1902. G. H. Carpenter. " Insecta Aptera," in Report on, Collections, Voyage of Soutlwrn Cross, 



pp. 221-;',, pi. xlvii. London (British Museum), l'.)02. 

 1906. Scottish National Antarctic Expedition. ' Scotia ' Collections. Collembola 



from the South Orkney Islands. I'roc. Royal Sor. Edinh., xxvi., I'.t0(!, pp. 478-483, pis. 1-2. 

 lUUO. E. W.\ULCiEEX. Antarktische und subautarktische Collembollen gesammelt von der schwedischen 



Siidpolarexpedition. Wissensch. Ergehn. der Schived. Siidpolarexpeditioii, l'.M)i-3, vol. v., 



lllOi;, pp. 1-22, ]ils. 1-2. 

 1902. V. AViLLEM. Collembok'S : Resultats di( Voyaije de S. Y. '■ Belgka' en 1S',)7, 1898, 1899. Rapports 



Scientijiques. An\-ers, 1902. 



EXPLANATION OF PLATE. 



Gompliiorepludus Iiodgsoiii. 



Fin. 1. — Left feeler with part of head, dorsal aspect; a, sub-apical, depressed sense-orgau ; b, sensory 

 bristle ; d, sensory spines on third antennal segment ; e, post-antennal organ ; /, dentiform 

 cephalic sense-organ ; e', e", variations in form of post-antennal organ from other specimeus. 



Fic. 2. — Eight feeler, lateral aspect of extremity ; ii and d as in fig. 1 ; c, apical, protrusiblc sense-organ. 



FifJ. 3. — Left mandible, seen from inner aspect. 



Fig. 4. — Left mandible, dorsal aspect. 



Fig. f). — Right maxillula, showing teeth and nmlar area. 



Fig. G. — Left maxilla ; .s-, stipes ; g, galea ; /, lamellae ; />, palp. 



Fig. 7. — Second pair of maxillae forming labium. 



Fig. 8. — Labrnm. 



Fig. 9. — Right hind leg, showing claw, vestigial empodium, and teuent hairs on foot. 



Fig. 10. — Ventral tube on first abdominal segment, seen from right side. 



Fig. 11. — Part of hind abdominal segments, showing anal spines, and vestigial spring (.s) and catch (r) : 

 lateral view. 



Fig. 12. — Tip of abdomen, with papillaj and anal spines ; postero-ventral view. 



All fiu'ures are magnilied GOG diameters. 



D 2 



