39. MONOCTEXUS. 40. PERKEYTA. 89 



39. MONOCTENUS. 



Monoctenus, DahTb. Consp. Tenthr. p. 3 (1835). 



1. Monoctenus juniperi. 



Tenthredo juniperi, Linn. Syst. Nat. i. p. 555, n. 9 (1758) ; Faun. 



Suec. p. 390 (1761). 

 Lophyrus juniperi, Klvg, Berl. Mag. yi. p. 61, n. 11 (1814); Hart. 



Blattw. p. 61, n. 11 (1814). 

 Tenthredo pterophorus, Sulz. Gesch. Ins. pi. xviii. fig. 110 (1776). 



Hab. Europe. 



a-e. J 5 ■ Germany. J. F. Ruthe. 



f-k. S 2 • Europe. 



2. Monoctenus hirsutus. 



Tenthredo hirsuta, Poda, Mus. Grcec. p. 102, n. 2 (1761). 

 Lophyrus obscuratus, Hart. Blattw. p. 172 (1837). 

 Monoctenus obscuratus, Thorns. Hym. Scand. i. p. 67 (1871). 



Hob. Germany, Sweden. 



a-e. d 2 • Germany. J. F. Ruthe. 



3. Monoctenus subconstr ictus. 



Monoctenus subconstrictus, Thorns. Hym. Scand. i. p. 67 (1871). 



Hob. Sweden. 



4. Monoctenus melliceps. 



Lophyrus melliceps, Cresson, Trans. Amer. Ent. Soc. viii. p. 26 

 (1880). 



Hah. Massachusetts. 



5. Monoctenus suffusus. 



Lophyrus suffusus, Cresson, Trans. Amer. Ent. Soc. viii. p. 26 

 (1880). 



Hab. Massachusetts. 



40. PERREYIA. 



Perreyia, Bridle, Hym, yi. p. 661 (1846) *. 



Brachytoma (Klug, MS.), Westw. Thes. ent. Oxon. p. 109 (1874), 

 nom. prceoc. 



* The type of Perreyia has 13-jointed antennae; Norton adds a species with 

 12 joints ; while "Westwood's genus Brachytoma includes species with 13, 14, 

 17. and 20 joints, Klug's original type {B. vitcllina) having 14. All the species 

 before me (anomala excepted) difi'er in no important character except in the 

 number of joints of the antenna?, which in some Tenth 'edinidce (e. g. Fenella 

 nigrita, "Westw.) is not even a specific character. 



