guyllid-e. I 



a. Adelaide. From Mr. Argent's collection, 



b. Swan Iliver. Presented by Sir J. Richardson, 

 f. Swan Iliver. From Dr. Bacon's collection. 



bb. Hind tarsi flat, digitate. 

 c. Four anterior tarsi ;5-jointed. 



Genus 3. TRIDACTYLUS. 



Tridacljlns, Oliv. Lair. Gen. Or. el Ins. 1807. Blanch. Hist. Nat. iii. 34. 

 Serv. Hist. Orlh. 311. — Aclieta, Coqueb. — Heteropus, Pal. de Beanv. 

 Ins. 230.— Xya, Illiffcr, MSS. Lair. Gen. iv. 1809. Burm. Handb. 

 Enl. ii. 741. Fisch. Orlh. Eur. 152. 



1. Teidactylus VARIEGATUS. 



Tridactylus variegatus, Latr. Hist. Nat, Ins. xii. 1 19; Geri. iv. 385. Nouv, 

 Did. Hist. Nat. edit. 2. Gen. Or. el Ins. iii. 97. Descr. Egijpte, Orlh. 

 pi. 3, f. 1. Blanch. Hist. Nat. iii. 34. Serv. Hist. Orth. 315. Brulle, 

 Hist. Nat. Ins. ix. 197, pi. 18, f. 6. Foudras. Observ. Trid. Pan. 1829. 

 Leon. Duf. Ann. Sci. Nat. Zool. ix. 321. — Xya variegata, Charp. 

 Ilor. Enl. ii. 741.. Sav. Descr. Egyple, pi. 3, f. 1. Burm. Handb. Enl. 

 ii. 742. Fisch. dc Waldh. Orlh. Ross. 117, pi. 3, f. 3. Ramb. Faune, 

 Ent. And. ii. 27. Fisch. Orlh. Eur. 154, pi. 9, f. 2. Doij, Atlas, 

 Regn. An. Cuv. pi. 81, f. 2. Kitlary, Bull. Sac. Imp. Mosc. xxii. 450, 

 pl.'7, f. 10, 11; 14—16. 



Algeria. 



a. S. Enrope. Presented by Dr. Leach. 



b, c. S. Germany. Presented by Dr. Burmeister. 

 d. S, Europe. From .^rof. VVestwood's collection. 

 e — g. Italy. Presented by A. H. Haliday, Esq. 



2. Tridactylus apicalis. 



Tridactylus apicalis, Saij, Journ. Acad. Nat. Sci. Phil. \v. 310, f. 1 ; Ent. 

 N. Amer. ed. Le Conle, ii. 239. Scudder, Journ. Boston Soc. Nat, 

 Hist. vii. 425. — Xya apicalis, Burm. Handb. Ent. ii. 741. 



Alabama. Kentucky. 



3. Tridactylus tehminalis. 



Tridactylus terminalis, Uhler, MSS. Scudder, Journ. Boston Soc. Nat. 

 Hist. vii. 425. 



Illinois. Massachusetts. Maryland. 



4. Tridactylus minutus. 



Tridactylus minutus, Scudder, Journ. Boston Soc. Nat. Hist. vii. 425. 



Illinois. 



5. Teidactylus africanus. 



Heteropus africanus. Pal. Beauv. Ins. 230; Orlh. pi. 2, f. 7. — Tiidaclyius 

 paradoxus, Latr. Hist. Cr. et fns. xii. 120; Gen. iii, 97. Dumeril, 



