30 T. A. Marshall’s Monograph of 
VII. CHANUSA, Hal. 
Hal., Hym. Brit., ii, p. 19 (1839). 
Maxillary palpi 6-jointed, the last joint suboval; labial 4-jointed, 
the two last joints short, consolidated so as to form a club some- 
what longer than the 2nd joint. Head somewhat transverse, sub- 
cubic, widened behind the eyes, smooth, shining, finely pubescent : 
eyes beset with scattered hairs ; mandibles subcompressed in the 
form of a prism, as in Chorebus, tridenticulate. Thorax densely 
punctulate, pubescent; prothorax large, transversely wrinkled ; 
mesothoracic furrows as in Chorebus, but smoother, the medial line 
almost effaced ; a linear fovea before the scutellum ; mesopleurz 
smooth, the usual furrow crenulate ; metathorax short, rounded, 
rugose, Stigma oval-lanceolate, shorter than in Chorebus, and 
broader than the length of the Ist abscissa, emitting the radial 
nervure from very near the middle ; radial areolet small, shorter 
than the preebrachial, remote from the tip of the wing ; recurrent 
nervure very slightly rejected ; 2nd discoidal areolet completely 
closed. Abdomen as long as the head and thorax, depressed, 
spathulate in the 2, elongate-oval in the ¢; Ist segment twice 
as long as its apical width, very little narrowed at the base, finely 
striolate and margined, its tubercles almost effaced ; before them 
there is generally a transverse impression resembling a false suture ; 
the following segments smooth, ciliate on the hind margin. 'Terebra 
very short. 
The single species of this genus has the general appear- 
ance of a Chorebus, differing only in the neuration and 
the labial palpi: this latter character probably induced 
Haliday to establish a new subgenus, though at the pre- 
sent day it would hardly be regarded as of primary 
importance. Nees von Hsenbeck strangely placed the 
insect in his genus Perilitus, notwithstanding the. 
mandibles, which are those of the Hwodontes, and not 
considering his own closely allied species Gyrocampa 
afjinis, which he more correctly referred to the genus 
Alysia. 
1. Chenusa conjungens, Nees. (PI. I., fig. 6.) 
Bracon conjungens, Nees, Mag. Ges. Berl., 1811, 
Pad, pl. ai. ie. 7: 
Perilitus conjungens, Nees, Mon.,1. p. 33, f @. 
C. conjungens, Hal., Hym. Brit., 1., p. 19; Marsh., 
hoScitcproll, gf Qy. 
