40 Orthorrhapha brachycera. 



Uie antennæ, on the vertcx iiiclnding the ocelli ; tlie vertex for tlie rest 

 yellow; llie inner eye-iiiargin narrowly black, sometinies widened 

 lielow, opposite to ttie widening of tlie niiddle stripe: clieeks black, silvery 

 haired, epistoma black ; hinder eye-margin yellow. broad, the impresscd 

 lines, separating tho vertex and the hinder eye-niargins, black. Thorax 

 as in the male bul the pale yellow spot on the pleura more distinct. 

 Scutellum generally more yellow than in the male. Legs often much 

 paler than in the male, feniora and tibiæ being yellow with faint 

 ijlackish rings, sometimes the femora nearly quite yellow: posterior 

 tarsi often only darkened towards the tips. 



Length '.i — 4,3 mm. 



This species is distinguisiied from the preceding by the moreorless 

 black scutellum, and the darker to black legs; in the male the silverwhite 

 frontal triangie. and in the female the yellow vertex and black thorax 

 are characteristic. The species is generally smaller than O. fonnosa, 

 but is may reach the same size; it is always broader and more robust. 



O. pyymwa is, like the preceding. rare in Denmark: Dyrehaven 

 (Stæger), Ernielund (G. Larsen), at Sorø (Jacobsen) and in greater num- 

 bers on Bornholm at Allinge (H. J. Hansen). It has been taken in July. 



Geographical distribution : — Northern and niiddle Europe. its 

 nortliern limit lies in southern Sweden, and it goes down into Austria. 



4. Stratiomyia Geoffr. 



(Stratiomys). 

 Species ofmiddle lo rather large size, generally of black colour, with 

 yellow designs on abdomen. Head about as broad as thorax. broader 

 than high, soniewhal hemispherical. but short. tlat or a iittle concave. 

 Antennæ inserted about in the middle of the front side, on thesomewhal 

 protruding front. Yowls only slightly descending below the eyes. Antennæ 

 seven-jointed. first joint long, about four times as long as the second, 

 the live last forming a somewliat fusiform. annulated part. ') Eyes bare 



') The annulaleil, fusiform part of Ihe antenna' in Stratiomyia seems to be liable 

 lo -some variation with regaid to the niiniber of joints actually present. In 

 S. Inngicornis and furcata I always found five. but in chamæhon and potumida 

 the last joint is subdivided in Iwo, so that there are six joints in all. Becker 

 has already pointed this out (Berl. Ent. Zeitschr. XXXI, 104), he says that he 

 also saw a subdivision in Umgicornis and in furcata, but in the latter less 

 distinct; perhaps there n>ay be some individual variation on this point. 1 have 

 examined an antenna of fnnata, cleaned in potash, under the uucroscope. but 

 the last joint was absolutely entire, and Wandolleck (Zool. Jahrl>. Abtheil fur 

 Syst. VlU, Tab. IS, Fig. iM) also tigures a similarly treated antenna of lonrii- 

 cornis with the last joint uot subdivided. According to this it would seem that cha- 

 mæleon and potainida have tlie last joint subdivided, longicorvix SLni\ furcata noi. 



