280 BRITISH ICHNEUMONS. [ //ni/rospi/us 



HENICOSPILUS, Stephens. 



Enicospihis, Ste. Illus. Man. vii. 126; AHocumpfiis, Forst. Verh. pr. Rheinl. 

 1868, p. 150 dice Thoms.). 



A genus of larire testaceous insects, with at most the anus and part of 

 thorax black. It has usually been considered an artificial division of 

 Opliion, but the followinjf constant characters render it \vx\ distinct. 

 Antennae more slender; much narrower lower diseoidal cell; basally 

 sinuate base of basal, and basally distinctly curved base of apical, abscissa 

 of radial nervure; the more slender mandibles with their upper tooth the 

 longer and subacuminate ; and especially the absolutely glabrous and 

 transparent area of the disco-cubital cell immediately below tlie stigma, 

 which area in our species bears one or two corneous spots. 



We possess four of the six European species of this genus, all of which 

 are by no means improbably but forms of the same ; the wing nervures 

 vary slightly at the junction of the basal with the median nervure and 

 below the stigma, the density of the corneous alar marks is instable, and 

 we have nothing but the extent of nigrescent colouration to fall back 

 upon, for I fail to note any distinction in the apical antennal attenuation, 

 referred to by Holmgren. 



Table of Species. 



(2). I. Lower mandibular tooth nearly as 



long as upper; glabrous alar area 



with but one corneous mark . . i. REPENTINUS, Uohngr. 

 (i). 2. Lower mandibular tooth two-thirds 



length of upper ; glabrous alar 



area with two corneous marks. 

 (6). 3. Thorax entirely testaceous, not nigres- 

 cent beneath. 

 (5). 4. Anus broadly black on the apical 



segments . . .2. RAMiDrLUs, Linv . 



(4). 5. Anus not broadly black on apical 



segments . . , . • • ,v imRRDARIUs, Gi'av. 



(3). 6. Thorax always nigrescent below and 



often discally also . . ■ ■ 4- COMBUSTU.S, Gj'civ. 



1. repentinus, Holingr. 



Ophion repentinus, Holmgr. Sv. Ak. Handl. 1858, p. 11, ^ s ; Voll. Pinac. pi. 

 xxxix, figg. 6, 6a. Hcnicospilits repentinus, Bridg. -Fitch, Entom. 1884, p. 177, 

 rf ?. Enicospilus repentinus, Thoms. O.K. xii. 1189; Brauns, Arch. Nat. 

 Meckl. 1889, p. 96. Var. Ophion repentinus, Voll. Pinac. pi. xxviii, fig. 7; 

 O. Tournieri, Voll. I.e. p. 61 ; Enicospilus rournieri, Brauns. Arch. Nat. Meckl. 

 1889, p. 96, (f . 



Testaceous, with the head partly flavidous and in ^ ^ 'ittle dilated 

 behind the eyes, which with ocelli are black. Antennae as long as body. 

 Abdomen slightly infuscate apically on either side. Tarsal claws dis- 

 tinctly pectinate, (dabrous alar area with but a single corneous and sub- 

 triangular mark ; radial nervure basally incrassate; nervellus intercepted 

 below its centre. Length, 16-20 mm. 



Holmgren says that the space between the eyes and ocelli is fully twice 

 broader than in H. ramidulus, but in my examples it is equall)- obsolete 



