8 Transactions of the Society. 



The virga is of several forms. 



A. Without basal vesicle. 



1. Quite simple, very long (Spon[/orosto:r ruher). 



2. Similar, but ending in u dilated chitin-plate (JVeso- 



gaster ruficeps, and perhaps in 8. assiniensis, S. 

 tripunctata, S. schldferi, S. conradti, Irdex nitidi- 

 peniiis, Labia marginalis, Chwtospania australica). 



B. With basal vesicle. 



1. Much longer than metaparameres, undulate or coiled, 



terminating in dilated chitin-plate {Marava doddi, 

 C. pittarellii). 



2. Scarcely longer than metaparameres. 



a. Terminating in broad chitinous triangular 



plate {Homotages fcx). 

 13. Apex simple {C. stile.tta, C. thoraciea). 



• 



The proparameres have a curious spongy dihition in the follow- 

 ing : — Homotages feiv, Spongovosto.e schldferi^ S. tripunctata, S. ruber. 



The preputial sac is denticulate in the following: — Spongo- 

 vostoc: ruber, Spongovostox sp. (fig. 20 of Zacher), Labia marginalis. 



The most striking feature is the complexity of the armature of 

 the pr?eputial sac, with the frequent and very varied shapes of the 

 chitin-plates and dilations of the virga. 



It is premature to generalize further on this group, or to suggest 

 any modification, or even the confirmation, of the existing system. 



Subfamily Chelisochin^. 



I quite agree with Zacher's opinion that this group is closely 

 related to the Labiida^, an opinion which, as he remarks, I had 

 already indicated in an earlier work. The fact that the metapara- 

 meres are acuminate in every known species is striking ; in many 

 instances they closely resemble some Labiine parameres, as will 

 be at once seen from the figures. 



The virga, however, approaches the Forficuline form. It is 



EXPLANATION OP PliATE II, 



FIO. 



1. Labia curvicauda Motsch. 



2. L. marginalis Thumb. 



3. Chietospania thoraciea Dohru. 



4. C. australica Borm. 



5a. Prolabia unidentata Beauv. 

 56. Ditto. 



6. CJielisoches morio Fabr. 



7. Adiathetus tenebrator Kirby. 



8, Proreus simulaiis St&l. 



9, Kinesis monnseyi Burr. 



FIG. 



10. Enkrates flavipennis Fabr. 



11. Proreus delicatulus Burr. 



12. Hamaxas nigrorufus Burr. 



13. Chelisoches ritsemx Burr, 



14. Lesochelidura bolivari Dubr. 



15. Anechura bipunctata Fabr. 



16. Allodahlia scabriioscula Serv. 



17. Anechura harmaudin Burr. 



18. Burriola euxina Serv. 



