1883.] ON HYMENOPTERA AND DIPTERA FROM TIMOR LAUT. 343 



EXPLANATION OF THE PLATES. 



Plate XXXIII. 



Fig. 1. Clausilia suhvirgmea, yt. 327. 



2. sublamellosa, p. 327. 



' 3. aphrodite, p. 329. 



4. ■ thicssew, p. 329. 



.5. asfropaUa, p. 3.30. 



0. scidpticollis, p. 331. 



7. , var. unia, p. 33L 



8. hcraclccnsis, p. 332. 



9. manseUi, p. 332. 



10. vermiculata, p. 333. 



Plate XXXIV. 



Fig. 11. Clansilia vesH, p. 334. 



12.- carpafhia, p. 33.5. 



13. pirivir/na, p. 336. 



14. concmcnosi, p. 337. 



15. ffoMfnssi, p. 338. 



16. schitchi, var. oscarii, p. 339. 



17. incrustafa, p. 339. 



18. aJiyssocIuta, p. 340. 



19. campylauchen, p. 340. 



3. Report on a small Collection of Hymenoptera and Diptera 

 from the Timor Laut Islands, formed by Mr. H. O. 

 Forbes. By W. F. Kirby, Assistant in the Zoological 

 Department, British Museum. 



[Eeceived April 16, 1883.] 



The Timor Laiit or Tenimber Islands are a small archipelago 

 situated to the north of Australia, about halfway between the 

 island of Timor and the Aru Islands. The largest island is Timor 

 Laut ; but the small collection before me, consisting of only five 

 species of Hymenoptera (all new) and three of Diptera, was formed 

 in two of the smaller islands, viz. Larat and Maroe. I will now 

 proceed to describe the Hymenoptera and to notice the Diptera, 

 merely remarking that they exhibit strong affinities to those of the 

 surrounding groups of islands, as would naturally be anticipated 

 beforehand. The specimens are numbered ; and I have noted these 

 numbers throughout. 



HYMENOPTERA ACULEATA. 



Apidjj. 



Crocisa c^ruleifrons, sp. n. 



Long. corp. 5 lin. 



Female. Black, face and orbits (very broadly above) blue ; pro- 

 thorax with a short stripe behind on each side above, and a very 

 large spot on the sides ; mesothorax with seven blue spots — two small 



