LIST OP THE BRITISH STRATIOMYIDiE. 83 



Museum and Mr. Dale's collection. Von Heydon has taken the 

 larva in a nest of Formica fuliginosa. 



3. Nemotklus, Geof. (1796), Hist. d'Ins. ii. 542. 

 = Stratiomys, F. ; Musca, L. 

 A. Abdomen in male basal half white, apical half black ; in female all 

 black, with a dorsal row of yellowish white spots. 



1. 3". Basal half of abdomen unspotted, belly white, humeral spots 



blackish. 

 2 . Sides of thorax unstriped. ijantherinus. 



2. 3. Basal half of abdomen unspotted, belly black, humeral spots 



whitish. 

 ? . Sides of thorax with a white stripe, no white spot above the 

 antennte. - - - ziliginosus. 



3. 3 . Basal half of abdomen with a central black spot. 



? . Sides of thorax striped, a white spot above the antennae, tiotatus. 

 AA. Abdomen in male and female all black. - - - nigrinus. 



1. N. uliginosus, L. (1767), Sys. Nat. ii. 983. = muticus,F. ; 

 bifasciatus, Mg. — I have a specimen from the late Mr. Walker's 

 collection, in which the abdomen is brown instead of yellowish 

 white. Common. Very variable. 



3. N. pantherinus, L. (1761), F. Suec. (1783). == marginatus, 

 F. ; uliginosus, Pz. ; marginellus, Fall. ; muticus, Schr. — This 

 species is said never to be taken in company with N. uliginosus. 

 Common. Very variable. 



3. N. nigrinus, Fall. (1814), Strat. 6 ; Curt. 729. = nigritus, 

 Pz. — Curtis says this species has a greenish cupreous tinge, which 

 I have not noticed, but perhaps this is the case during life. Not 

 common. 



4. N. notatus, Staeg. (1842), in Zett. Dip. Scan, i., 148. 

 = ventralis, Mg. — Introduced as British by Mr, Verrall, in the 

 Ent. Mo. Mag. for Jan., 1886. Eather rare. 



Walker and Curtis both say N. hrevirostris, Mg., has been 

 taken near London, the former adding, " in the Entomological 

 Club;" but as I can trace no specimen, and it is a very rare 

 species on the Continent it seems advisable to exclude it until 

 further capture takes place. Nearly all the species of Nemotelus 

 are very variable, and it is difficult to determine them with 

 certainty unless a series of specimens is available for examination. 



4. OxYCERA, Mg. (1803), Illiger's Mag. ii. 265. 



= Sargus, Odontomyia, Lat. ; Stratiomys, F. ; Musca, L. 



A. Abdomen green (or greenish yellow in one var.), with black rnarkings 



never extending to the edge. trilineata. 



AA. Abdomen black, with yellow spots or bands always extending to the 

 edge. 



B. Wings with dark brown suffusion below the stigma. - - analis. 

 BB. "Wings withoi;t suffusion. 



C. Abdominal spots only at the extreme edge and tip often united, or 



abdomen all black. 



D. Abdomen all blaek. 



K 2 



