Stratiomyiidae. 73 



4. B. Morrisii Dale. 



1842. Dale, Eiitom. 175, 75. — 1855. Zell. Dipt. Scaiid. XII, 4552, 

 2_3. _ 1862. Schin. F. A. 1, 24. — 1903. Kat. palaarkt. Dipt. Il, 38. — 

 1840. Beru palUpes, Loevv, Stett. Ent. Zeit. Vil, 284, 5. 



Male. Eyes with rather short hairs, facets of the same or almost 

 of the same size. Antennæ dark brown; the two basal joints long, 

 almost as long as the rest, the annulated part has in the middle on 

 the inner side a slight excision or impression which is yellowish. this 

 excision gives the antennæ a peculiar appearance. Thorax bright 

 greenish or bluish metallic with brownish, somewhat longish pubes- 

 cence. Abdomen dark brown, shining, with yellowish brown pubes- 

 cence which is long at the margin. Venter brown, shining. Legs long 

 and slender, pale yellow ; anterior metatarsi at the apex, and the 

 last foLir joints blackish brown ; hind metatarsi much thickened, longer 

 than the tom- foilowing joints, which are also slightly dilated, meta- 

 tarsus brownish towards the apex, the four last joints blackish brown. 

 Wings yellowish with brownish veins, stigma brown. Halteres yellow. 



Female. Eyes short and sparingly hairy. Front black, rather 

 narrow, only occupying the fifth part of the breadth of the head. 

 Thorax with short, pale yellow pubescence. Wings slightly more hyaline 

 than in the male. 



Length 7 mm. 



This species is easily distinguished from the preceding, in the 

 male by the shining brown colour of the abdomen, in the female by the 

 narrow front, and in both sexes the peculiar antennæ is a good character. 



B. Morrisii is very rare in Denmark, only four specimens have 

 been taken, two from earlier times with the locality Sealand, one on 

 Lolland (Schiødte) and one in .Jutland in Greisdalen near Vejle (H. J. 

 Hansen) ; the dates are in June. 



Geographical distribution: — Northern and middle Europe from 

 Southern Sweden down into Austria and Herzegowina ; it occours also 

 in North America in Canada. 



As I have examined larvæ of all Danish genera of Stratiomyids 

 with the exception of the unknown larva of Beris I shall try to give 

 a synoptic table of them ; in parenthesis I add the name of the species 

 examined. Of Strationiyia and Odonionujia I have examined the 

 larvæ of several species, and I give a table of theni. this, liowever, 

 must be used with some caution as not all the species have been 

 examined. 



