Bombyliidae. 117 



Length. This species is distinctly larger, especially broader, than 

 paniscus, the length is 13 — 15 mm. 



After Kunci<;el d'Herculais the pupa has the armature on the 

 front side of the head very different from thai in A. fenestratus; the 

 two upper spines are almost united, the lover are separated, but 

 small, and those on the lover side of the head are very small, 

 wart-like. 



A. hottentottus is very rare in Denmark, I only know four speci- 

 mens, all females, taken at Vedbæk. 



Geographical distribution: — All Europe and down into Algeria; 

 towards the north to middle Scandinavia. 



Remarks: The three species A. circumdatus, paniscus and hotten- 

 tottus are very nearly related and very similar, and they have often 

 been confused. A. circumdatus is in the male easily known by its 

 banded abdomen, and the female also is distinguished without diffi- 

 culty by the distinct bands on the fifth and sixth segments; flnally, 

 in both sexes the black hair tufts at the sides of the fifth and sixth 

 segments are small and inconspicuous. A. paniscus is in the male 

 distinguished from circumdatus by the want of bands on the abdomen, 

 in the female by the very small bands or abscence of these on the 

 fifth and sixth segments, and in both sexes the black hair tufts at 

 the sides of fifth and sixth segments are somewhat larger and distinct. 

 A. hottentottus is in the male distinguished from paniscus by the hair 

 tufts on the seventh segment being yellow, by the patagium-like, scaly 

 piece at the base of the wing being yellow or even somewhat brownish, 

 not silwerwhite; generally it also has the frons more covered with 

 yellow, depressed hairs and the wings clearer; in the female this 

 species is very difficult to distinguish with certainty from paniscus; 

 generally the band on the third abdominal segment is a little more 

 distinct, but a good helping character is the size, the species being 

 larger, especially broader than paniscus-, thus in the female oi panis- 

 cus the breadth of the abdomen generally measured 5"^™ or slightly 

 more, the fringe included, while in hotteyitottus it was nearly 7™™. 



The characters given by Schiner (F. A.) for hottentottus (flava) 

 "Hinterer A ugenrand rothgelbhaarig" and for paniscus "Augenhinter- 

 rand silberweiss", I have not found correct. The analytical table of 

 Schiner gives one the impression that paniscus and hottentottus {flava) 

 should be different by hottentottus having distinct and visible bands 

 on the abdomen which are supposed to be absent in paniscus, while, 

 as seen from the above descriptions and as already pointed out by 

 Kowarz (Wien Ent, Zeit. 168) the two species are very similar in 

 this respect, the bands in the male of hottentottus being only very 



