232 C It. Osten Sacken: Diptera 



this is really a character of T. manto it would show an affinity with 

 the european Adurae, so very like it in the distribution of the spots 

 on the wings. As far as I can see the third vein is nearly bare; the 

 Costa and first vein are beset with weak, microscopic hairs; the antennae 

 are plumose, (which is not the case in Aciura). — In the figure which 

 I give, the venation of the posterior portion of the wing is indicated 

 by dots, because the wings are pasted together in my specimen. 



Enicoptera. 



The genus Enicoptera Macq. D. E. Suppl. III p. 63, Tab. VII, 

 f. 9, is easily recognizable by its singular venation, due to a wavy 

 course of the second vein, near its end, the wave coming in contact 

 with the end of the first vein and forming a kind of noose. The 

 supernumerary row of bristles on the lower part of the front on each 

 side, and the presence of a praesutural bristle, prove that it is a 

 Trypetid, although the termination of the auxiUary vein is like that of 

 the Ortalidae. The number of abdominal segments in the male is four, 

 the fii'st segment consisting of two, soldered together; the suture is 

 visible on the ventral side. The female has five abdominal segments, 

 the fifth being as long as the preceding. The first segment of the ovi- 

 positor is unusually long, as long as the three or four preceding seg- 

 ments taken together (it is comparatively longer in the larger specimens) ; 

 convex above and below; the second segment is of corresponding length. 

 (Macquart described only the male). 



The chaetotaxy is very like that of Trypeta: 



Vertical bristles: outer pair but little shorter than the inner; post- 

 vertical small; ocellar pair exceediugly minute; two fronto-orbital bristles 

 (only one in some specimens?); lower fronto-orbital 3 (sometimes 4?) 

 placed in an oblique row, at equal intervals, between the orbit and the 

 lunule; a genal bristle, under the eye. Humeral bristle, one; posthumeral 

 two, praesutural one; supra-alar three; a praescutellar pair, far apart. 

 Mesopleural, one; sternopleural none, pteropleural one (very small). — 

 Scutellum — four. 



The difiference from the typical Trypetae consists in the absence 

 of a second pair of bristles in the dorso-central region, and of a sterno- 

 pleural bristle; and in the presence of only a single mesopleural. 



Mr. Walker (J. Pr. Lin. Soc. IV, 155) described four species from 

 Celebes, which he refers to Enicoptera. But his E. pictipennis is 

 identical with his own Sophira distorta (Walker, Trans. Ent. Soc. N. S. IV, 

 230) and is not a Enicoptera. E. tortuosa Wk. seems to be closely 

 related to E. flava Macq. The two other species, if Enicopterae at 

 all, are different from my E. proditrix. 



