92 Tachinidae. 



not variegated or clear wings. As regards tlie shape of the wings the 

 genus is somewhat peculiar; in some species the wings are of normal 

 shape and equal in both sexes; but in most species the male has 

 the wings much broader than the female and at the same time liable 

 to some dimorphism, as in the same species the wings of the male 

 may be broad or be narrower and more like the female wing; at the 

 same time the colour both of body and wings varies and is rather 

 like the colour in the female, so that these males upon the whole 

 are female-hke; in obesa a special male form occurs which is almost 

 quite like the female. In hemiptera there is moreover the curious 

 faet, that the male normally has dilated front tarsi, but the female- 

 like males not. 



The species occur generally on flowers, especially various um- 

 bellifers and on Achillea. The development is not known, but Hemi- 

 ptera and also Orthoptera are suspected as their hosts, and they belong 

 to Pantel's group 9. 



Of the genus (s. 1.) 7 European species are recorded, 4 occur in 

 Denmark. 



Table of Species. 



1. Orbits densely haired 2. 



— Orbits bare 3. 



2. Subcostal vein ending beyond medial cross-vein; first 

 posterior cell somewhat short-petiolate ; hind femora red 

 on basal part; pleura with dense and long golden red 



hairs {Allophora s. str.) 1. hemiptera. 



— Subcostal vein ending about above medial cross-vein; 

 first posterior cell longer petiolate; legs all black; pleura 

 black-liaired {Hyalomyia R. D.) 2. obesa. 



3. Large species; head considerably broader than high; 

 wings in male generally broad and variegated {Phorantha 



Rond.) 3. subcoleoptrata, 



— Small species; head almost not broader than high; wings 

 not broad, equal in both sexes, not spotted, hyaline or 



a little yellowish {Paralophora Girsch.) 4. pusilla. 



1. A. hemiptera Fabr. 



1794. Fabr. Ent. Syst. IV, 284, 22 {Syrphus) et 1805. Syst. Antl. 218, 2 

 (Thereva). — 1824. Meig. Syst. Beschr. IV, 191, 8 {Phasia) et 1838. VII, 289, 1, 

 Tab. LXXIII, Fig. 43. — 1844. Zett. Dipt. Scand. III, 1246, 2 (Phasia). — 

 1862. Schin. F. A. I, 403. — 1888. Girsch. Zeitschr. f. Naturwiss. LX, 10, 1, 

 Tab. II, Fig. 1—5. — 1894. Pand. Rev. Entom. XIII, 88, 5. — 1907. Kat. 

 palåarkt. Dipt. III, 577. — 1924. Stein, Arch. f. Naturgesch. 90, 6, 259, 3. — 



