310 Mr. Westwood on Diopsis, 



invenitur, atque scutellum ipsum spinis duabus tam brevissimis armatur, 

 quas pictoi- omisit in delineatione insecti. 



Wiedemann does not state the colour of the legs nor the habitat of this 

 species ; but he has supplied the latter omission in his memoir upon Achias, 

 where he states it to be from Java. In addition to the characters given above, 

 which I have translated from Wiedemann's German description, the following 

 are observable in his figure. The ocular peduncles are about the length of 

 the abdomen, and slender ; the anterior femora are rather thicker than the 

 others, and the base of the abdomen for more than half its length is narrow 

 and linear, and is suddenly clavate, and as broad as the thorax. 



Species 20. Diopsis Svkesii. G. R. Gray. 



Tab. IX. Fig. 18, 19. 



D. nigra, abdomine in medio pedunculisque oculiferis piceis, pedibus fulves- 



centibus, alis fuscis hyalino-fasciatis. 

 Long. Corp. lin. 3;| — 3|. Expans. alar. lin. 6. 

 Habitat in India Orientali. Sykes. In Mus. Sykes, Gray, nostr. 



Praecedenti alis fasciatis thoraceque 6-spinoso vald^ affinis, at colore nigro 

 spinisque scutellaribus longis diversa. Caput nigrum, vix nitidum, os 

 versus attenuatum, dente subrecto utrinque armatum, facie in medio 

 convexa, linea longitudinali elevata. Haustellum pallidum. Pedunculi 

 oculiferi in speciminibus robustioribus capite cum thorace paullo lon- 

 giores, sed in aliis longitudinem corporis ferfe sequant, piceo-nigri, spina 

 una in medio, alteraque ad apicem supra oculos. Anteimce fnscae. OcuU 

 rufi. Thorax totus niger, opacus, investimento sericeo-subcinerascenti : 

 collari et scutello concoloribus. Mesothorax supra locum insertionis alarum 

 utrinque spina valida, acuta, picea armatum ; alteraque breviori, obtusa 

 metathoracica : scutello etiam spinis duabus illo triplt) longioribus, piceis 

 instructo. Abdomen valdfe clavatum, praesertim in individuis robustiori- 

 bus, nigrum, apice articuli Imi (longissimi) latfe piceo, et utrinque (pone 

 lineam articulationem prsecedentem referentem) macula subpallida seri- 

 canti in certo situ conspicienda. Alas fuscescentes, apicem versus obscu- 

 riores, sed basin versus ferfe ad nervum medium transversum hyalinae. 



