DESCRIPTION OF THE SPECIES. 269 



T. plioenicura n. sp. $. (Tab. XI, f. 12.) Nigra, capite pedi- 

 busque ochraceis, alarum nigrarum incisuris marginalibus guttulisqne _ 

 inter venas longitudinales tertiam et quartam tribus pellucidis, vena 

 longitudinal! tertia nuda, setis scutelli duabus. 



$ . Abdomen ex ferrugineo rufum, segmento ultimo nigro. 



$> . Abdomen nigrum, basi ferruginea, terebrS, lata Isete aurantiaca. 



Black, head and feet ochreous-yellow ; wings black, with hyaline inden- 

 tations along the margin and with three hyaline drops between the third 

 and fourth longitudinal veins ; the third longitudinal vein is not 

 bristly ; the scutellum has two bristles. 



. Abdomen ferruginous, its last segment black. 



9 . Abdomen black, ferruginous at the basis ; the broad ovipositor is of 

 a vivid orange-yellow. Long. corp. $ 0.14, 9 0.15 0.16 ; long. al. 

 0.14. 



Black ; head of an impure ochre-yellow ; the occiput alone mostly 

 blackish ; front narrow, especially anteriorly ; frontal bristles black. 

 Eyes very large, cheeks very narrow. Face short, concave ; nevertheless, 

 the anterior oral edge not projecting in the profile. The antennae reach 

 down to the oral edge ; their third joint is rounded at the tip ; the blackish 

 arista is long and slender, apparently bare. Oral opening of medium 

 size, rounded ; proboscis not geniculate. The thorax and the two- 

 bristly scutellum are black, their short pile yellowish-white, their bristles 

 rather black ; the somewhat rounded abdomen of the male is of a dirty 

 ferruginous color (in living specimens its color may be purer) ; its last 

 segment is black. The extent of the black color is greater in the female 

 abdomen, the first segment, the basis of the second, and the anterior 

 corners of the third alone, being ferruginous. The short pile of the 

 abdomen is paler, almost yellowish in the male, somewhat brown in the 

 female ; on the posterior border of the last segment of the abdomen of the 

 female there are some black hairs. The flattened, comparatively broad 

 ovipositor, attenuated towards its end, has a shining surface ; its color is 

 a very bright orange-yellow, the tip alone shows a narrow black border ; 

 its short pubescence is pale. Coxae and feet ochreous-yellow ; the 

 extreme tip of the posterior femora is somewhat blackish. Wings com- 

 paratively long and narrow, towards the end somewhat less broad and less 

 obtuse than those of T. insecta, black, with a hyaline picture ; near the 

 costa, anterior to the stigma, there are three small hyaline spots, the first 

 anterior to the humeral crossvein, the two others in the costal cell ; 

 immediately beyond the stigma, which is altogether black, there are two 

 conspicuous triangular hyaline spots, which, with their pointed end, do 

 not quite reach the third longitudinal vein ; on the posterior margin of 

 the wing there are six hyaline indentations, the last of which alone ends 

 in a point ; the first two are connected with the almost hyaline posterior 

 angle of the wing, reach as far as the fifth longitudinal vein, and are 

 separated by a much broader black band than the other indentations ; the 

 two following indentations cross beyond the fifth vein, the first below the 



