14 



Platypezidae. 



1. C. amoena Meig. 



1824. Meig. Syst. Beschr. IV, 12, 2, Tab. XXXIII, Fig. 13. ^ 1838. Zett. 

 Ins. Lapp. 531, 4 (Callomyza) et 1844. Dipt. Scand. III, 913, 4. — 1862. Schin. 

 F. A. I, 239. — 1901. Verr. Brit. FL VIII, 26, 2, figs. 43—52. — 1907. Kat. 

 palåarkt. Dipt. III, 183. — 1910. Wahlgr. Entom. Tidsskr. 231, 2. — Callo- 

 myza leptiformis var. a. Zett. 1819. Vet. Acad. Handl. 79. 



Male. Vertex and frons black, the latter together with the 

 face greyish. Occiput greyish black, with black, somewhat long hairs 

 below. Antennæ black or blackish. Palpi yellowish to blackish brown. 

 Thorax velvet black, the præalar depression more or less greyish, 

 not velvet. Pleura black, somewhat greyish; the ex- 

 treme hiimeral point yellowish brown. Abdomen 

 velvet black, sometimes all over, but generally with 

 somewhat silvery side spots which may be present on 

 first, base of second and just visible on fifth segment, 

 but, when more developed, distinct at base and on 

 front part of fourth and fifth segment. Abdomen has 

 long, black, bristly and outstanding hairs, on sixth 

 segment they are shorter, but stronger. Præhypopygial 

 segment and hypopygium greyish; the latter almost 

 globular, bare, with hairs only at ventral and apical 

 margin; the end-lamellæ or claws small, cleft into two 

 teeth, the outer triangular, the inner styliform; below 

 the hypopygium is a pair of claw-like, furcated append- 

 ages (not a single middle process as Verrall says). 

 Legs brown or blackish brown, the anterior the palest; 

 hind tibiæ dilated outwards and hind metatarsi and 

 the two following joints somewhat compressed and 

 dilated. The legs are short-haired, front and hind 

 femora with long cilia above and below, otherwise the femora slightly 

 haired; hind tibiæ a little cihated above; middle tibiæ with two 

 apical spurs and a dorsal bristle above middle, and hind metatarsus 

 with a bristle below near base. Wings clear, but more or less yellow, 

 third costal segment more strongly yellow; veins black. Squamulæ 

 brown. H alteres orange. 



Female. Of a quite dilTerent aspect. Eyes separated; vertical 

 bristles present. Frons silvery, with a bristle on each side. Thorax 

 velvet black, with a large silvery humeral spot and a transverse 

 Silver band behind. Abdomen with the first three segments orange, 

 the second with a narrow black hind margin; at the base there is a 



Fig 4. 



C. amoena ^ , 



hind leg 



X45. 



