Patton.] 388 [January 21, 
genus, in the conception of Fabricius, contained species which agreed - 
in essential structure. The species, therefore, from which he 
described that structure, if he indicates it, must be taken as typical 
of the genus no matter where it stands in the list. The 4-pustulatus 
stands next to the last. The ichneumoniformis stands third in the 
list. In the Syst. Piez. (1804) Fabricius decided that 4-pustulatus 
belonged to Scolia; vespiformis and ichneumoniformis he still retained 
in Larra. The Larra of 1793 becomes, therefore, a synonym of 
Scolia and a new genus Larra is made for the non-typical species. 
But Latreille in 1802, Hist. Nat., vol. 111, had described a genus 
Larra with ichneumoniformis as its type. The name, therefore, 
should be quoted from Latreille, and as vespiformis.is now known to 
be generically distinct from ichneumoniformis, vespiformis cannot be 
its type. In 1802 also Latreille established a genus Stizus with 
tridentata (of which Larra bifasciata Fabr. is a synonym) as its type; 
to this species vespiformis is allied. Fabricius 1804, therefore, 
should be quoted as authority for Larra in synonymy only, since his 
genus contained the types of two of Latreille’s prior genera. 
Even if this reasoning were not convincing we should be obliged 
to accept Latreille’s decision as to which portion of the Fabrician 
genus should retain the name — and he selected ichneumontformis as 
typical. L. ichneumoniformis Fabr. is a recognized synonym of L. 
anathema (Rossi). 
Larra argentata Beauv., Ins. Afric. et Amér., 119, t. 3, f.9. Lyrops 
argentata Say, Bost. Journ., 1,370; Larrada argentata Smith, Cat. H. 
B. M. rv, 292. 
Larra distincta. JLarrada distincta Smith, Cat. H. B. M., tv, 
292, 2. 
Larra acuta n. sp. 
Larra arcuata. Larrada arcuata Smith, Cat. H. B. M., rv, 
293, 9. 
Larra luctuosa. Larrada luctuosa Smith, Cat. H. B. M., rv, 
289, 2. : 
Larra luteipennis. JLarrada luteipennis Cress., Tr. Am. Ent. 
Soc., 11, 293, &. 
Larraignipennis. Larrada ignipennis Smith, Cat. H. B. M., rv; 
288, 2 ¢; Cress., Proc. E. S. P., rv, 137. 
Larra trifasciata. Larrada trifasciaia Smith, Cat. H. B. M., rv, 
200sKee 
Larra vinulenta. Larrada vinulenta Cress., Proc. E. 8. P., rv, 138. 
