Asilidae. 



71 



Legs black; coxæ greyish pruinose witli long, whitish hairs; the short 

 hairs on the legs varying in colour, generally yellowish on most parts 

 but black on the dorsal side of the femora, especially the anterior 

 feniora, and on the dorsal side 

 of the tibiæ; not rarely black to 

 a higher degree, and sometimes 

 on the contrary nearly all yellow ; 

 long and thin hairs are foimd on 

 the ven tral and posterior sides 

 of the femora and on the ventral 

 side of the front tibiæ, also a 

 few on the ventral side of the ^'^ ^^*- ^- ^^""^^^^' "^"^^ ^^^^^P^" 

 middle tibiæ; some of them are rather strong and bristly, especially 

 a rov^ on the ventral side of the front femora; they are black on the 

 ventral side of the front tibiæ and likewise the more bristly ones on 

 the front femora, otherwise they are yellow; spine-like bristles are 

 found on the ventral and anterior sides of the posterior femora, on 

 the dorsal and posterior sides of the front tibiæ and on the various 

 sides of the posterior tibiæ except on the posterior side of the hind 

 tibiæ; as usually there are some apically on the posterior femora; on 

 the ventral side of the front femora none are found; the spine-like 

 bristles vary in colour but are generally yellow on the anterior side 

 of the posterior femora and on the posterior side of the anterior tibiæ, 

 for the rest they are black with yellow intermingled. The spine-like 

 bristles on the tarsi are black and yellow. Wings yellowish brown 

 fumigated; veins brown. Balteres yellow. 



Female. Quite agreeing with the male; the ovipositor black, 

 shining, longer than the two last segments ; its upper margin is slightly 

 convex, the lower margin 

 straight; the second upper 

 piece is more than one third of 

 the first piece in length; the 

 lower piece is strongly and 

 rugosely punctate at the apex ; 

 the lamellæ are shining, with 

 only a few points; the lower 

 piece has long and strong hairs on the basal part. 



Length 12-16 mm. 



The pupa has a length of 13 mm. ; it has the spines on the first 

 abdominal segment somewhat longer than on the foUowing segments 

 and recurved at the apex. 



D. forcipula is common in Denmark; Ermelund, Ørholm, Hillerød, 



Fig. 25. D. forcipula, female ovipositor. 



