Cynorrhina. 501 



yellowish red on about the anterior third, black on the rest; often 

 the red band is divided in the middle by a broader or narrower line 

 with black hairs. Scutellum coloured and haired as thorax, the tiairs 

 black. Pleura with long, blackish or more brownish hairs, sometiraes 

 reddish in front. Abdomen ovate, black and shining; it is clolhed 

 with dense and relatively long pile, longest towards the apex; the 

 hairs are black or brownish black on the two first segments, reddish 

 on the third but darker to blackish in the middle, and long and whitish 

 on the fourth segment; the genitalia have black hairs. Venter black, 

 shining, more ore less grey pruinose at the base; the hairs long, 

 mainly reddish. Legs black, the extreme apex of femora reddish; 

 tibiæ lighter or darker brown or reddish with a somewat undefmed 

 black ring about the middle ; tarsi yellowish to brownish, the last joint 

 blackish and the next more or less blackish above; the legs haire^i as 

 in Criorrhina, the hairs black or brown. Wings yellowish and yel- 

 lowish brown at the base; they have the same two clouds as in the 

 species of Criorrhina, the median fascia rather broad and dark, the 

 subapical cloud continued distinctly down the medial cross-vein and 

 along the last part of the discai vein, Squamulæ and fringes blackish. 

 Balteres brownish black. 



Female. Vertex moderately broad, frons widening downwards, 

 both black, shining; the hairs black, sometimes paler in front, the 

 space above the antennæ bare. Epistoma black, only somewhat 

 pruinose at each side of the antennæ and down the sides; for the 

 rest the female similar to the male, 



Length 12,5—14 mm. 



This species is rather similar to Bombus terrestris and is perhaps 

 the most Bomhus-\\k.e fly of all Syrphids. 



P.apiformis is rare in Denmark; Ordrup Mose (Stæger), Dyre- 

 haven (Drewsen), Hillerød (Godskesen), and on Falster. My sole date 

 is ^/7. Nearly all specimens are from earlier time, while it has only 

 very rarely been taken in the later years. A larva was taken in 

 Dyrehaven on ^4 under the bark of a beech, it pupated, but on ^^/5 

 the pupa was dead (Kryger). It is recorded to be especially a spring 

 species like the species of Criorrhina and to frequent flowers of Prunus 

 and Grataegus. 



Geographical distribution:— Europe down intoltaly; towards the 

 north to southern Sweden. 



38. Cynoprliina Willist. 



Also this genus is allied to, and in most characters similar to 

 Criorrhina^ with which it was united as a somewhat aberrant species 



