of some new Species of Diopsis. 549 
graciles. Thorax cum spinis scutellaribus (arcuatis) et metathoracicis, 
piceo-niger. Scutellum sordidé albido-fuscescens. Abdomen dimidio ba- 
sali fusco-rufescenti, parte posticá obscuriori, vel piceo. Ale hyaline, 
fascia tenui basin versus, 2dàá latissima centrali, et 3tià tenuiori externe 
curvata, apicem versus alarum fuscis. Pedes fusco-rufescentes, femori- 
bus anticis paullo incrassatis, posticis ad apicem inermibus, pedibus posti- 
cis nisi ad basin femorum paulld obscurioribus. 
Species 30. (vel 19c.). DioPsis ORNATA, mihi. 
Tas. XXVIII. Fig. 12. 
D. atra, capite abdomine pedibusque piceo-nigricantibus, oculis ferrugineis 
pedunculis oculiferis capite paullo longioribus, femoribus anticis dilatatis, 
posticis quatuor ad apicem spiniferis ; abdomine dilatato clavato ; alis 4- 
fasciatis, fascia 1mà angustáà et ad partem 3am longitudinis alarum sitá, 
2da latissima medium alarum occupanti; 3tià angustá et 4tà apicali. 
Long. corp. 3 lin. 
Habitat ? i 
Diopsis fasciata. Guérin Icon. Règne An. Ins. pl. 103. fig. 8. (descriptione 
nondum edita). : 
I have been obliged to give a new specific name to this insect, in order that 
it may not be confounded with the D. fasciata of my monograph. 
Species 31. (vel 19d.). Duopsis CIRCULARIS. 
Tas. XXVIII. Fig. 13. 
D. “Noir; dilatations du front brunes. Genoux et tarses anterieurs et inter- 
mediaires fauves. Ailes à grand tache discoidale brune arrondie, en- 
tournée d'un cercle hyalin. 
Long. corp. 34 lin. 
Habitat in Indià orient. 
Diopsis circularis. Macquart Hist. Nat. Ins. Dipt. vol. ii. p. 486. 
With reference to the geographical range of this genus, the species above 
described prove, as already surmised, that it is confined to the Old World, 
