a Genus of Dipterous Insects. 295 
assertion that his insect was identical with the D. Ichneumonea,) has Bengal ; 
whilst Dalman, ignorant of the true existence of any East Indian species, says, 
* Veri tamen videtur simile D. Ichneumoneam habere patriam Guineam, cum 
omnes hucusque rite cognitz species hujus generis sint cives istius regionis." 
By recurring, however, to the Linnzean species of Paussus, the doubts may in 
some degree be diminished.  Linneus received both insects from the same 
source; Afzelius, after much inquiry, discovered that the Paussus was taken at 
the Bafianas, or the adjacent part of Sierra Leone and tropical Africa. Now 
the insect which I have described under the name of D. collaris, and which is 
the only species with the transverse subapical fascia on the wings whose habi- 
tat is clearly known, is from Senegal. Hence, therefore, from all the pre- 
ceding circumstances, together with the fact that no true Diopsis has been 
found in the New World, I think we may safely consider that Linnzeus's insect 
was from Guinea, or some other part of the coast of tropical Africa. 
Species 2. Dropsis coLranrs, mihi. 
Tas. IX. Fig. 2. 
D. rufo-testacea, thorace (nisi collari rufo) nigro, alis macula transversa, ante 
apicem posità femoribus 4 posticis inermibus. 
Long. corp. lin. 34. Expans. alar. lin. 6. 
Habitat in Senegallià Africze. In Mus. nostr. 
Statura D. apicalis at brevior. Individuum nostrum e forma abdominis foemi- 
ninum esse videtur. Caput rufo-testaceum, glabrum, nitidum, versus os 
attenuatum, ibique emarginatum et utrinque spinà minuta acuta paullo 
divergenti armatum. Haustellum fuscum. Facies convexa, sulculo lon- 
gitudinali tenui lineáque arcuatá fuscá in pedunculos oculiferos terminata, 
alteráque arcuatá supra os. Regio ocellorum nigra. Pedunculi cum oculis 
capite et thorace conjunctim paulld breviores, obscure ferruginei, apice 
nigri. Spina intermedia brevissima, pone medium sita. Spina terminalis 
feré obsoleta. Antenne fulva: setá apicali nigra. Oculi nigri, ad basin 
ferruginei. Collare rufescens, ad latera postice dilatata. Thorax niger, 
nitidus, suprà vix sericeus, subtüs magis sericeo-cinerascens. Scutellum 
thoraci concolor. Spine scutellares flavæ, graciles (apicibus in specimine 
