58 



Orthorrhapha brachycera. 



Of Asilinæ about 236 species are known from the palæarctic 



region, of these 13 have Iiitherto been found in Denmark, and these 



all belong to the nearly related genera, formed by Low as groups 



under Asilus. 



Tahle of Genera. 



1. No bristles at the hind margin of the abdominal segments, 

 or if such bristles are present, with numerous spine-hke 

 bristles on the front side of the middle femora, or if 

 not, with the epistomal callus small, not reaching half 

 the length of epistoma; female ovipositor conical, not 

 compressed, sometimes with spines at the end 2. 



— Bristles at the hind margin of the abdominal segments 

 present; spine-like bristles on the front side of the 

 middle femora not numerous; epistomal callus reaching 

 more than half the length of epistoma ; female ovipositor 

 compressed 6. 



2. No bristles at the hind margin of the abdominal seg- 

 ments 3. 



— Bristles at the hind margin of the abdominal segments 



present 5. 



3. Colour lively, brown, black and yellow; legs all ferru- 



gineous ; large species 10. Asilus. 



— Colour not lively, brownish or greyish 4. 



4. Epistoma not shining black in the middle ; wings brown 

 at the apex, at the base milk-white in the male, hyaline 



in the female 9. Pamponerus. 



— Epistoma shining black in the middle; wings hyaline. 11. Rhadiurgus. 



5. Male genitalia large ; female ovipositor swollen ; numerous 

 spine-like bristles on the front side of the middle femora; 



tibiæ reddish 12. Antipalpus. 



— Male genitalia somewhat slender, the upper forceps with 

 a large excision above; female ovipositor small, conical, 

 with spines at tlie apex; very few spine-like bristles on 



the front side of the middle femora; tibiæ not reddish 8. Philonicus. 



6. The bristles on the middle of the thoracic disc con- 



tinued to or near to the front end 13. Dysmachus. 



— The bristles on the middle of the thoracic disc only 

 continued to or slightly beyond the middle 7. 



7. The hairs on the venter strong, bristly; male genitalia 



small, eighth ventral segment without any prolongation. 17. Epitriptus. 



— The hairs on the venter not bristly ; male genitalia large, 



or the eighth ventral segment with a prolongation 8. 



8. Male genitalia somewhat swollen ; eighth ventral segment 

 in the male without any prolongation ; sixth and seventh 



abdominal segments form part of the female ovipositor. . 16. Neoitamus. 



— Male genitalia not swollen, eighth ventral segment in the 

 male with a prolongation; sixth and seventh abdominal 

 segments not forming part of the female ovipositor 9. 



