THE CANADIAN ENTOMOLOGIST. 207 



Abdomen slender, compressed, shorter than the wings, pitchy black ; 

 apical margin of the last segments pale ; villosity white, rather scarce. 



Female genitals with two transverse rows of black bristles, two cylin- 

 drical black appendages with very long black hairs, and between them an 

 advanced black part of the margin with strong bristles. (Rambur says 

 with two appendages "formant deux petites saillies an peu plus epaisses " 

 — which I cannot find.) 



Male genitals similar to M. mob His, the spoon-shaped part shorter, 

 triangular, yellow. 



Legs slender, reddish-yellow ; apical half of femur black ; tibia 

 blackish ; the posterior legs externally reddish-yellow, except on tip ; 

 tarsi blackish, sometimes yellowish at base ; spurs about as long as the 

 basal joint, straight ; claws brown. 



Wings in shape and venation like M. immaculatus, with the hind 

 margin convex ; hyaline ; veins black, interrupted with yellow ; ptero- 

 stigma milk-white, blackish interiorly. 



Length of body, 25 to 32 mm.; exp. al, 55 to 84 mm. Breadth of 

 hind wings, 6 to 8 mm. 



Hab. — Everywhere in Europe, only England and the islands in the 

 Mediterranean excepted. A pair collected in Castilia by Staudinger is 

 quoted by myself Stett. Ent. Z., xxvii, p. 290. A. Costa figures it from 

 Naples. In Russia it is known from Livland to Astrachan and Nert- 

 schinsk, Siberia. 



I have eight specimens, male and female, before me from Sweden, 

 Prussia, Silesia, Switzerland. The imago flies from July to September. 

 I have raised this species, which is common in Germany. 



In the collection of Linnaeus a specimen of this species on the character- 

 istic Linnean pin, bearing in his own handwriting on the label the 

 name "formicalynx," is still present. I have seen it in 1857 and 1861. 



The high authority of my friend McLachlan, and the emphasis with 

 which he declines to acknowledge this specimen as typical (Tr. Lond. Ent. 

 Soc, 1871, p. 443), oblige me to state why I hold decidedly the contrary 

 opinion. Mr. McLachlan bases his objection solely on the fact that the 

 specimen is identical with the Swedish species, and that the African 

 habitat, given by Linnaeus for his M. formicalynx, must belong to a 

 different species (though the few words of the diagnosis given will apply 



