172 



HARDWICKE'S SCIENCE-GOSSIF. 



Elgiva, Mg., resembles Tclanocera ; two or three 

 of the five British species are fairly common. 



In Sepedon, Latr., the imago has the faculty of 

 running over the surface of water ; allied to El^^iva 

 and Tetanocera ; two species British. 



Fsila rosa, F., feeds on the carrot in the larval 

 state. Ten species of Psila are British, resembling 

 Tetanocera. 



Loxocera, Mg. (2 spp.), inhabits damp woods, 

 running over the foliage. 



Micropeza corrigiolata, L., a fly with much attenu- 

 ated thorax and abdomen, and long and thin legs ; 

 found chiefly on broom ; long 6 mm. ; common. 



Dorycera grainiinun, F., occurs in grass and 



Fig. 145.— O/iV.r, L. (mag.; 



Fig. 146. — Dl.ia, Mg. (mag.) 



Fig. 147. — Limnobia, Mg. (mag.) 



lowers, sometimes swarming ; larva aquatic ; pupa 

 two-horned. 



Ceroxys, Mcq., on tree trunks. 



Plafystoina seminationis, F., on flowers and hedges 

 — in spring ; somewhat resembling Lwinia marginata 

 in general appearance, but smaller and more stoutly- 

 built. 



The Trypctidic are a well-marked group, in which 

 the wings are beautifully ornamented with brown 

 and black markings, thus affording an easy means of 

 determining the species. The principal genera are 

 Trypeta, Mg., and Tephritis, Latr., all the genera 

 occurring on plants, the larvae being leaf-miners. 



Lonchcea, Fin., and Falloptera, Fin., inhabit fields 

 and grassy banks. 



In Saprouiyza, Fin., the larvffi live on decaying 



animal matter. Macquart, a French writer, has 

 found them in fungi ; about twenty species are 

 British ; many common ; mostly closely allied, and 

 nearly all yellowish, with yellowish wings. 



S. rorida, Fin., is tawny; face broad, wfth a 

 small black spot on the vertex ; eyes black ; wings 

 yellow ; legs pale yellow with black tips ; common ; 

 long 4 mm. S. liipuliria, F., is distinguished from 

 the latter by a blui.sh-grey. thorax. 



Oponiyza germinationis, Fin., very common every- 



Fig. 148. — Ptychoptera, Mg. (mag.) 



Fig. 149. — Rhyphus, Latr. (mag.) 



Fig. 150. — Tanypus, Mg. (mag.) 



Fig. 151. — Method of pinning down Diptera, &c. 



where. Yellowish, with a dorsal row of blackish- 

 brown spots on the abdomen ; face, antennce, 

 and legs yellow ; wings pale grey, the two transverse 

 veins and border towards the tip blackish ; long 

 4 mm. 



Sepsis is common on umbelliferous flowers. 



S. cynipsea, L., smooth ; shining black ; wings 

 clear, with a small black round spot at tip ; long 

 4 mm. ; larva lives in decaying animal matter ; very 

 common everywhere. 



