292 NORTH AMERICAN TRYPETINA. 



the head of Oxyna, as for instance Oxyna elongatula Lw., and 

 its congeners, will have to be admitted in the genus Ensina. 



Observation 4. A Brazilian species, not rare in collections, 

 likewise belonging to Ensina, is so very like humilis, that I give 

 here its description, in order to avoid a possible confusion. 



T. peregrina n. sp. $ 9 (Tab. X, f. 30.) Luteo-cinerea, abdouiiue 

 nigro-maculato, genis angustissimis, peristomio eximie producto, pro- 

 boscidis geniculatse labellis longissimis, alls elongatis et subsequaliter 

 fusco-reticulatis ; pedes lutei, basali femorum posticorum dimidio piceo; 

 terebra foeminae atra, tribus ultimis abdominis seguientis simul suintis 

 longiore. 



Yellowish-gray, abdomen spotted with black ; the cheeks very narrow, 

 the oral edge very much produced, the flaps of the geniculated proboscis 

 very much prolonged ; wings comparatively long and rather uniformly 

 reticulated with brown ; feet of a saturate yellow, basal half of the 

 hind femora black ; ovipositor of the female black, larger than the last 

 three abdominal segments taken together. Long. corp. $ 0.12 0.13; 

 9 cum terebra 0.140.16; long. al. 0.130.14. 



Resembles T. sororcula Wied. from Tenerifle and the European T. elon- 

 gatula Lw. very much, both in the structure of the body and in general 

 appearance. In the female sex, it dilFers from the latter easily by its 

 ovipositor, which is once and a half as long; the male is easily distin- 

 guished by several features of the picture of the wings, which in other 

 respects is very much the same: namely, the drop which lies at the tip 

 of the submarginal cell is not present in T. elongatula; in the dark color- 

 ing at the extreme end of the discal cell there is only a single hyaline 

 drop, while in T. elongatula there are several of them, usually three. 

 From T. humilis it differs sufficiently ill the scutellum, which is tinged 

 with yellow at the tip, in the coloring of the feet and in the picture of the 

 wings. Yellowish-gray ; the head, of the same structure as in the species 

 just compared with it, rather saturate yellow, as well as antennae, palpi, 

 and proboscis ; the occiput alone in part gray. Front long and not very 

 broad ; along the orbit with a narrow, rather whitish border. Antennae 

 rather broad, not quite descending to the anterior edge of the mouth, 

 which is somewhat drawn upwards and remarkably projecting in the pro- 

 file. Eyes rounded ; cheeks very narrow. Oral opening very much drawn 

 out ; the very elongated flaps of the geniculated proboscis reach backwards 

 to the mentum. The usual bristles of the front, the thorax, and the scu- 

 tellum are black ; the latter is yellow at its tip only. The abdomen is of 

 the same color as the thorax, and bears, like the latter, some short, pale 

 yellowish pile, while the longer hairs on the posterior border of the last 

 segments are black. The flattened and only moderately pointed ovipositor 

 is shining black and a little longer than the last three abdominal segments 

 taken together ; its short pubescence is almost without exception black. 



