140 STRATIOMYID^ 



second and third abdominal segments, which occupy all the sidemargins 

 of those segments and which are widest along the hindmargins but not 

 produced angularly, and the fourth segment has a narrow orange margin ; 

 the antennse have only the two basal joints left and they seem to be 

 blackish. It is recorded from North and Middle Europe, but not from 

 the extreme North. 



Synonymy. — I have no doubt about this being the species for which Loew 

 adopted Panzer's name of ancfnlata, and Panzer's description and figure fairly well 

 represent it. It is also obviously Zetterstedt's 0. riijicornis. If Walker had it 

 before him in his Ins. Brit. Dipt, it must be his *S'. hydroJeon, but it is not the 

 0. hydroleoyi of Zetterstedt or Loew ; and I am inclined to think that it is the 0. 

 hydropota of Duncan because of his description of the antennae. Loew suggested 

 that Macquart's 0. latifasciata must be allied, but if a specimen so named in Bigot's 

 collection represents Macquart's species it must be a synonym of 0. hydropota., 

 which was a species unknown to Loew when he made the suggestion. 



4 O. ornata Meigen. Basal joint of the antennae only a little longer 

 than the second. Abdomen flattened, black with three pairs of large side- 

 spots of almost equal size and the tip orange. Wings almost unicolorous. 



A large handsome Stratiomi/s-like fly, 



c^ . Face and f rons black, bulging out when seen in profile, and forming when 

 seen from in front a sharj^ly retreating equilateral triangle of which the sides 

 are very slightly arched ; face all covered with long yellowish or greyish white 

 rather drooping pubescence which is often rubbed off the middle and then 

 leaves a shining black middle line extending from the antenuce to the mouth, 

 and the pubescence elsewhere is not quite dense enough to hide the black 

 ground colour ; jowls broad and flat but drooping at the mouth-edge, bearing 

 similar pubescence to that on the face, l:)ut the actual margin against the eyes 

 on the lower half of the face and round under the eyes is shimmering white ; 

 back of head hardly jjerceptibly inflated, dull black and bearing obscure 

 brownish or greyish orange pubescence, but the postocular marginal rim has 

 only a minute adherent broAvnish orange pubescence which is directed forwards, 

 and even this rim disappears on the upper part of the back of the head and 

 the moderately long pubescence extends up to the hindmargin of the eyes, but 

 as the eyes at this part are somewhat dilated there is no sign of any postocular 

 fringe when viewed from in front ; vertex shining black, at its widest part less 

 than one-twelfth the width of the head and narrowing forwards almost to the 

 frons, but for about six facets the eyes may be considered touching, as the 

 coarse black line of upturned pubescence extending downi between the eyes 

 from the lower ocellus ceases for about that distance just before the frons ; 

 ocellar space with very little black pubescence ; frons with depressed greyish 

 white pubescence and with a distinct middle channel. Proboscis rather long 

 and with moderate sucker-flaps ; palpi very much withdraw^n, cylindrical, 

 brownish orange at their tips and bearing long pale pubescence there. Eyes 

 bare ; facets on the larger upper part distinctly larger than those on the 

 smaller lower part, and the line of distinction fairly well marked but 

 not strongly so on either the front or back part ; the eyes are more 

 shining on the area of the small facets. Antennae black, ferruginous at the 

 junction of the joints and to a greater or less extent from ithe base of 

 the third joint onwards ; basal joint rather longer than the cup-shaped second 

 joint, and both these joints rather shining and bearing tiny bristly pubescence ; 

 third joint porrected and widely diverging, dull brownish black where not 

 ferruginous, quite bare, about three times as long as the basal two together, 

 and with indistinct annulations of which the first four are about equal in 

 length while the short fifth and the sixth together are aliout as long as each 

 preceding one, the three basal annulations are about equal in thickness and 

 are distinctly punctulate, the fourth is contracted and not at all punctulate, 

 while the fifth and sixth jointly form an awl-sha]jed end which has a rather 

 blunt point from which a microscopical thin whitish arista proceeds. 



