Tachinidae. 67 



includes by far the greatest number of species. They are parasitic 

 on Insects, especially on lepidopterous larvæ, but also on Coleoptera, 

 Tenthredinidae, Diptera and Orthoptera. 



Table of Genera. 



1. Third antennal joint shorter than the long second ; 



eyes bare 2. 



— Third antennal joint as long as or longer than 



second, when shorter the eyes are hairy 3. 



2. Cheeks only hairy; ocellar bristles present; pro- 



pleura hairy on upper part 100. Echinomyia. 



— Cheeks with bristles; no ocellar bristles; pro- 



pleura bare 101. Peleteria. 



3. Posterior cross-vein more oblique than apical 

 cross-vein and issuing about below medial cross- 

 vein or a little more apically 4. 



— Posterior cross-vein less or even as oblique as 



apical cross-vein 6. 



4. Eyes hairy 113. Plagia. 



— Eyes bare 5. 



5. Discai angle with a veinlet or fold; exca vation 

 on second abdominal segment reaching the hind 



margin; no distinct costal spine or a small one. . 114. Voria. 



— Discai angle without veinlet; excavation on 

 second abdominal segment not reaching hind 



margin; a strong costal spine 115. Klugia. 



6. Frons and face very broad, somewhat bladdery 

 inflated, wax-coloured, with many bristles; 

 ocellar bristles reclinate; arista with long second 



joint and more or less geniculate 85. Gonia. 



— Frons and face less broad and not inflated, nor 

 wax-coloured 7. 



7. Thoracic squamula hairy above; vibrissal ridges 

 curved much inwards below and thus here nar- 



rowing epistoma 99. Nemoraea. 



— Thoracic squamula not hairy; vibrissal ridges 



not curved strongly inwards below 8. 



8. Hind tibiæ with a dense anterodorsal row of 

 equal bristles; two sternopleural bristles (only 



in W. amoena three) 9. 



— Hind tibiæ without such a regular row of bristles, 

 or the bristles less equal; generally more than 



two sternopleural bristles 10. 



9. Cheeks more or less hairy 81. Winthemia. 



— Cheeks bare 82. Carcelia. 



10. First posterior cell ending more or less before 



5* 



