DESCRIPTION OP THE SPECIES. 305 



female deep black, as long as the last two abdominal segments taken 

 together. Long. corp. cum terebra 0.16 ; long. al. 0.16. 



Closely allied to T. albiceps and very like it, but easily dis- 

 tinguished by its very broad wings. Yellowish-gray ; thorax 

 and abdomen with yellowish-red pile; the abdomen with two 

 longitudinal rows of black spots. Head yellowish ; front and 

 antennae more yellow; the usual bristles on the front black, the 

 bristles on the vertical margin bright reddish-yellow. The third 

 antennal joint with an almost sharp anterior corner. The oral 

 opening longer than broad, the upper oral edge somewhat drawn 

 upwards, distinctly projecting in the profile. The rather broad 

 palpi and the proboscis are yellowish; the latter short geuiculate, 

 with but moderately prolonged, rather stout flaps ; the occiput, 

 in the vicinity of the point of attachment, grayish. The ground 

 color of the humeral callus is yellowish, that of the thorax black- 

 ish ; the bristles of the dorsum are black, the two pairs upon its 

 middle are inserted upon very small black dots, easily overlooked. 

 Scutellum yellow at the tip. with four black bristles. Ovipositor 

 of the female shining black, about as long as the last two abdo- 

 minal segments taken together (in the only specimen in my 

 possession the shape of the ovipositor is not distinctly discerni- 

 ble, but it does not seem to differ from that of T. albiceps) ; its 

 short pubescence is delicate, and hence somewhat difficult to per- 

 ceive ; its coloring seems to be altogether reddish. Feet saturate 

 yellow. The wings are very broad and have a rounded elliptical 

 shape. The guttate reticulation shows the most striking likeness 

 to that of T. albiceps, so that the description of the latter may 

 be applied to this ; the only addition to be made would be, that 

 the region immediately below the stigma is somewhat darker and 

 a little less guttate. Thus the figure of the wing of T. albiceps 

 gives quite a correct idea of the wing of the present species, 

 except of its broader shape; moreover, the three posterior drops 

 of the usual pyramid are smaller, and separated by larger inter- 

 vals, and the intervals of all the six drops are perforated by 

 much more numerous small drops. The third longitudinal vein 

 is likewise not beset with bristles in this species. 



Hab. West Point, N. Y. (Osten-Sacken). 



Observation. The systematic position of this species is exactly 

 the same as that of T. albiceps. 

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