412 



ICHVEUMOMD.i:. 



Fig. 117. 



acheron, Mori. 



;*04. Exochilum acheron, Mori. 



Exochilum acheron, Morley, Rev. Iclm. Brit. Mus. ii, 1913, p. 79. 



6 $ . A red species, with only the thorax and part of the head 

 black. Head nearly as broad as the thorax and in $ not strongly 

 buccate posteriorly ; frons and 

 vertex irregularly strigose, the 

 former centrally carinate, with a 

 somewhat elongate horn between 

 the ficrobes ; face in botli sexes 

 flavous, largely and superficially 

 punctate, somewhat shining ; 

 clypeus concolorous, apically 

 truncate and subglabrous ; cheeks 

 wanting ; mandibles (except api- 

 cally), frontal orbits broadly above 

 and below, the genal and centre 

 of external orbits, flavous. An- 

 tennce piceous (13 millim. in 

 length), with their apical third 

 clear fulvous ; scape entirely 

 ttavous. Thorax black and ru- 

 gosely punctate, with the meso- 

 pleura) smoother and a pale 

 -callosity beneath radices ; notauli indicated ; metanotiun with 

 long black hairs, extremely strongly reticulate, with the inter- 

 stices smooth, its produced apex trans-striate and laterally 

 elevated. Scutellum (in the typical form) black, subquadrate, 

 longitudinally strigose and centrally impressed. Abdomen red and 

 discally linear, with the second and centre of first segment infus- 

 cate or black; basal segment slightly explanate laterally at its 

 apical fifth and somewhat distinctly immediately before its apex; 

 terebra 1 millim. in length. Legs red, with the anterior tibiae and 

 tarsi flavidous, and only the apical third of the hind tibiae black : 

 hind metatarsus fully double the length of the second joint and 

 both spatuliform, with their tarsal claws strongly recurved and 

 basally distinctly lobate. Winys slightly fulvescent, with the 

 tegula; and stigma fulvous ; first recurrent emitted from centre of 

 the internal cubital nervure ; basal nervure subcontinuous; nervellus 

 distinctly geniculate, postfurcal and intercepted above its centre. 

 Length 20-24 millim. 

 Type in the Oxford Museum. 



This can hardly be the unknown $ of E. signatum, Grav., 

 though certainly closely allied thereto as regards its elongate 

 pilosity. The type is an old specimen and quite possibly rubbed, 

 but the abdomen is by no means unusually short. 



There is a pair of this species in the Calcutta Museum, which 

 differs from the above description only in the flavous scutellum ; 

 I propose to term this, var. scutellatum. The pair in question 

 was captured at Sadiya in Assam, whence the typical form also 

 originates. 



