Cutiterebra and its Allies in the British Museum. 08 7 



Cutiterehra riifiventris^ Macq. 

 (P]. XIII. fio-s. 3, 3 a.) 



Vuterehra rujiventris, Macquart, Dipteres Exotiques, ii. 3, pp. 21-22 

 (1843) ; Brauer, Monographie der Oestriden, pp. 245-246 (1863). 



A female sjDecimen from Ecuador, collected bj Mr, Clarence 

 Buckley, undoubtedly belongs to this species, which was 

 described from a single male from the neighbourhood of Para 

 (Brazil) : Brauer merely translates Macquart's description 

 without having seen a specimen. I therefore append a 

 description of this female. 



$ . Length 23-^ millim. (rather more than that of Mac- 

 quart's type, which he states as 9 1. (French), = 20 millim.) ; 

 width of vertex 3§ millim. ; width of head 9g- millim. ; width 

 of thorax at base of wings 9 millim. ; length of thorax in- 

 cluding scutellura \\\ millim. ; width of abdomen (second 

 segment) \\\ millim. 



Margins of the front next the eyes below bordered with 

 yellowish pollen, which on each side runs out inwards in two 

 triangular projections, enclosing the uppermost " espace 

 arrondi luisan " of Macquart; the lower of these triangular 

 ])rojections extends to the Jissura frontalis ; the bare spots on 

 the j^ce large and very conspicuous when the head is viewed 

 from in front. Thorax greyish black ; scutellum reddish 

 brown, darker at the sides, semitranslucent by transmitted 

 light, flattened, and somewhat acuminate, yellowish pollinose 

 below ; a strongly marked brownish-black median stripe 

 extending from the anterior margin of the thorax to the 

 middle of the scutellum, about 2 millim. broad in front, and 

 tapering somewhat posteriorly ; on each side of this a light 

 grey stripe of about half its width, and, contrary to the state- 

 ment of Macquart, extending to a distance of 2 millim. beyond 

 the suture ; outside the grey stripe a black one on each side 

 running to the scutellum, somewhat broader than the grey 

 stripe in front, but extremely attenuated behind the suture ; 

 the greyish area outside the last-mentioned stripe on each 

 side somewhat indistinctly divided by a broader black stripe, 

 which joins the inner margins of the tubercles on the ante- 

 rior and posterior angles : pectus and pleuraj greyish pollinose, 

 two small dark brown shining spots, of which the posterior is 

 the more elongated and duller, on the pleurae below the spots 

 of black pile noticed by Macquart ; the yellow pile clothing 

 the pleurae and pectus forming a narrow fringe, which limits 

 the dorsum and extends to the posterior tubercle above the 

 base of the wing ; dorsum and upper surface of scutellum 

 clothed with short black pile, becoming more conspicuous 



