COLLECTED IN BORNEO, ETC. 129 



deeply punctured, the abdomen more finely so; one or two of the 

 basal joints of the flagellum green above ; the region of the ocelli 

 blue. Thorax : a transverse blue line in the middle of the prothorax ; 

 the mesothorax with an oblong-quadrate blue shape in the middle ; 

 the wings subhyaline with the nervures brown. The abdomen with a 

 central longitudinal smooth line ; the middle of the abdomen tinged 

 with rich blue ; the apex distinctly tridentate. 



The valuable collection of Hymenoptera which I have described, 

 and, by permission of the Society, have had the pleasure of laying 

 before them, is the property of W. W. Saunders, Esq., Fellow of 

 the Society, and is the most complete collection formed by Mr. 

 Wallace. In addition to the iuterest attached to the description 

 of new species, I have endeavoured to show the extent of the 

 known geographical range of those already described. Of the 

 family Apidce, forty-one species are enumerated, twenty-six of 

 which are new. It is, however, to the Formicidce that the most 

 valuable additions are made : of the eighty-five species collected, 

 only seven have been previously described ; ten are added to the 

 Mutillidce, forty-one to the Fossorial group, aud thirteen to the 

 family Vespidce. This enumeration will serve to give some idea of 

 the valuable additions to science, resulting from the labours of 

 Mr. Wallace, in collecting the insects of the Eastern Archipelago. 



Description of the Plates. 



Tab. I. 

 Fig. 



1. Tongue of Ptenoplectra chalybea. 1 a, labial palpi; 1 b, paraglossae ; 



1 c, labium. 



2. The maxilla of Ptenoplectra chalybea^ 2 a, maxillary palpus. 



3. The posterior leg of Ptenoplectra. 



4. Calcar or spur on the posterior tibia of Ptenoplectra. 



5. Anterior wing of Ptenoplectra. 



6. Myrmica lovgipes, $ . 



7. The labial palpi of Polyrhachis. 



8. Maxillary palpi of Polyrhachis. 



9. Thorax and abdomen of Polyrhachis bihamata. 



10. Labial palpi of Heptacondylus. 11. Maxillary palpi of the same. 



12. Wing of the same. 13. Profile of the same. 14. Antennae of 



the same. 

 15. Profile of Physatta. 16. Labial palpi of the same. 17 '« Maxillary 



palpi of the same. 18. Wing of the same. 19. Antennae of the 



same. 



