54 GENERIC SYNOPSIS. 
MELICERTA Steph. ——-—-- 1 sp. M. ochroleucus St. 
Antenne 9-jointed; third joint longer than the fourth ; two marginal, three sub- 
marginal cells, the first not shorter than the second, 
HETERARTHRUS Steph. Puytroroma* Fall. 1 sp.  T. ochropoda K\. 
Antenne 11 to 15-jointed, third joint twice as long as the fourth; two marginal 
and four submarginal celis; the veins between the basal ones interrupted. 
FENELLA Westwu. ———- 1sp.  F. nigrita Westw.+ 
_ Antenne 11-jointed, slender ; two marginal, three equal-sized submarginal cells ; 
first and second receiving a recurrent nerve. 
FENUSA Leach. Empnyrus (F.) Hartig. 3sp. T. pumila Kl. 
Antenne 9-jointed, slightly clavate ; two marginal and three equal-sized submar- 
ginal cells ; the first and second receiving one recurrent nerve ; body short, stout. 
DRUIDA Newm. Ent. Mag. vol. iv. 261.; v. 484. lsp. D. parviceps Newm. 
Antenne filiform, 10-jointed; first and second joints minute, third long, fourth 
rather shorter, remainder gradually decreasing ; two marginal, three submar- 
ginal cells; first and second receiving a recurrent nerve. 
MESSA Leach. Frnusa p. Hartig. 1sp. T. hortulena Kl. 
Antennz 9-jointed; first and second joints short, third elongate, remainder 
decreasing ; one marginal, and four submarginal cells. 
NEMATUS Leach, Tenrurepvo p, Linn, 40 sp. (St.) T. Capree Fab. 
Antennx 9-jointed; one marginal, four submarginal cells; the second receiving 
two recurrent nerves; tarsi simple. Panz. 65. 8. 
CRZESUS Leach. Nematus p. Jur. Ssp. I. septentrionalis Linn. Curt. 17. 
Antenne 9-jointed ; one marginal, four submarginal cells, the second receiving 
two recurrent nerves ; basal joints of posterior tarsi greatly dilated. 
EKUURA Newm. PristreHoratt} St. Farg. Cryptocampus Hartig (1?) PP. atra 
Jur. tab. 6. 
Antennx 9-jointed, simple; one marginal, three submarginal cells; first very 
small; second very long, receiving two recurrent nerves. 
PRISTIPHORA Latr. PriorHorus Dhlb.? 6 sp. T. Myosotidis Fab. 
Antenne 9-jointed, simple ; one marginal, three submarginal cells; the first large, 
receiving two recurrent nerves; the second small. Pz. 98. 13. 
TRICHIOCAMPUS Aartig. Nematus p. Steph., St. Farg. (5?) WN. grandis 
St. Farg. Steph. pl. 38. f. 1. 
Antenne $-jointed; ¢ with the base of the third joint dilated, pilose ; one mar- 
ginal and three submarginal cells of nearly equal size; the first and second 
receiving a recurrent nerve. 
CLADIUS Leach. Preronus p. Jur. 1 sp. Cl. difformis Leach. Pz. 62. 10. 
Antennz 9-jointed, pectinated in g; one marginal, three nearly equal submarginal 
cells; first and second receiving a recurrent nerve. 
Subfamily 4. Lydides Westw. 
LOPHYRUS Latr. Preronus Jur. 3sp. JT. Pini Linn. Curt. 54. 

-* JT have not adopted this name in the restricted sense in which it is used by 
Dahlbom and Hartig, haying been employed by Fallen for all the short-bodied 
Tenthredinides with short antenna; the species of Athalia being its types. 
(Fall. Mon. Tenthre. Suc. p. 27.) The species which Dahlbom gives were even 
doubtingly considered by Fallen to belong to the genus. I had generically named 
the only British species, Decatria, which Mr, Stephens has changed. 
{+ Nigra, femorum apice, tibiis tarsisque obscure luteis, alis nigricantibus. (Long. 
1lin. Exp. Alar. 3 lir.) 
