4 Rey. T. A. Marshall’s Monograph of 
A, Dacnusa semirugosa, Hal. 
D. semirugosa, Hal., Hym. Brit., ii., p. 7; Marsh., lib. 
a. p. 463; ¢ 2. 
3 2 Radial nervure not sinuated, forming a parabolic curve, 
remote from the tip of the wing. Black, shining. Antenne 
about 36-jointed, somewhat shorter than the body in the 9, longer 
in the 4; the subapical joints short and oval. Mesothoracic 
furrows very slender, smooth, converging towards a fovea in front 
of the scutellum ; metathorax rugose, carinated in the middle, 
covered with not very dense pubescence ; furrow of the meso- 
pleure rugose. Wings slightly infumated ; squamule brownish ; 
nervures and stigma fuscous, the latter linear-lanceolate, gradually 
attenuated to the apex, emitting the radial nervure before one- 
third of its length; radial areolet lanceolate ; 2nd discoidal areolet 
open on the outer side ; posterior wings with a punctiform vestige 
of a recurrent nervure, not found in other species. Legs brownish 
red ; cox and base of the trochanters black ; femora often streaked 
with black on the upper edge, the 4 posterior frequently blackish 
altogether. Abdomen subsessile, oblong, depressed, not much 
narrowed at the base ; 1st segment cbconic, one-half longer than 
broad, longitudinally rugulose, with scattered pubescence and 
almost invisible tubercles ; 2nd segment finely rugulose, the rest 
smooth. Terebra concealed. Length, 2 lines ; exp., 34 lines. 
A large species, and easy to determine. Not uncom- 
mon: found in Ireland by Haliday; in 'ngland by 
Rudd, Walker, and myself, in Yorkshire, 5. Wales, and 
Wiltshire. 
5. Dacnusa striatula, Hal. 
D. striatula, Wal., Hym. Brit., 11., p. 7; Marsh., lb. cit., 
p. 465, ¢. 
3d Mesonotum impressed longitudinally with a deep medial 
furrow ; the two ordinary furrows distinct, but not extending to 
the point of junction in front of the scutellum. Black, pubescent ; 
mandibles brownish ; palpi blackish. Antenne <omewhat longer 
than the body (in my specimen), as long as the bocy (according to 
Haliday), 28-jointed. Mesothoracie furrows punci sie, incomplete 
posteriorly ; metathorax obtuse, without a medi rina, coarscly 
rugose, reticulated; furrow of the mesople. broad, rugose. 
Wings slightly infumated; squamule brownish; nervures and 
stigma dark fuscous; the latter linear, rather stout, emitting 
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