20 Families ani> Genera of 



2. Antenna; short, with a subterininal bristle. , . Oxycera 

 Antennae more or less elongate, without bristle. ... 3 



8. Scutellum with two spines on its border 4 



Scutellum with six spines. [Compare Scoliopelta.] 

 4. Antennae much elongated, style not differentiated, eyes bare, 



smaller species Euparhyphus 



Antennae less elongate, style more or less differentiated, eyes 

 pilose, larger species Clitellaria 



Pachygastrin.*:. 



Small species, abdomen oval. Three posterior veins, all arising 

 from the discal cell. Antennae situated near the middle of the face 

 in profile, third joint short, with a terminal arista, scutellum with- 

 out spines Pachygaster 



Allognosta Osten Sacken, Berl. Ent. Zeit. XXVII, 297, 1883. 



Beris Latreille, Hist. Nat. des Crust, et des Ins. XIV, 340, 1804. 



Scoliopelta Williston, Entom. Amer. I, 119, 1885- 



Sargus, Fabricius, Ent. Syst. Suppl. 566, 1798. 



Macrosargus Bigot, Ann. Soc. Ent. Fr. [6] IX, 225, 1879. 



Microchrysa Loew, Verb. Zool.-Bot. Ver., 1855. 



Ptecticus Loew, Verb. Zool.-Bot. Ver., 1855. 



Chrysonotus Loew, Verb. Zool.-Bot. Ver., 1855. 



Hermbtia Latreille, Hist. Nat. des Crust, etc. XIV, 338, 1804. 



Odontomvia Meigen, Klassific. etc. I, 128, 1804. 



Myxosargu.'< Brauer, Denkschr. d. k. k. Akad. d. Wiss. 1882, 21. 



Stratiomyia Geoffroy, Hist. Nat. Ins. II, 475, 1764. 



Oxycera Meigen, Illiger's Magazine, II, 265, 1803. 



Euparyphus Gersta>cker, Linn. Entom. XI, 1857. 



Clitellaria Meigen, Illiger's Magaz. II, 265, 1803. 



Nemotelus Geoffroy, Hist. Nat. Ins. II, 542, 1764. 



PArHY<;ASTER Meigen, Illiger's Magaz. II, 266, 1803. 



T A N Y S T O M A . 

 Tarsi with three membranous pads at the tip (the empodia devel- 

 oped pulvilliform); body and legs wholly without macrochaetae ; 

 males holoptic, eyes rarely narrowly separated ; two sub-marginal, 

 five posterior cells in the wing,* fifth posterior cell not contiguous 



* The genns Agnotomyia with four posterior cells, ie the only 

 exception. 



