INTRODUCTORY PAPERS ON ICHNEUMONID-Sl. 13 



Lend., 1881, p. 145, pi. viii., figs. 1 & 2). H. hrunnicornis is a 

 common parasite of various species of Hyponomeuta ; it is partlj' 

 figured in Vollenhoven's ' Schetsen ' (pt. i., pi. iii., fig. 12). 



COLPOGNATHUS, WeSVl. 



Scutellum black, 2nd to 4th and 5th segments of the male, 1st to 4th 

 of the female red ; legs red ; coxne, trochanters, apex of hind femora, 

 base and apex of hind tibiae, black; antennae of female tricoloured 

 (variable in this respect). - - - 1. celerator, 3 — 4 lines. 



This species is also figured in Vollenhoven's ' Schetsen ' 

 (pt. i., pi. iii., fig. 13). It is apparently uncommon in Britain, 

 notwithstanding what Gravenliorst says. Brischke says it has 

 been bred from Boiihecia hylceifor>iiis* ; but Eondani gives Botys 

 nuhilalis (^ silacealis = Iwpulinalls). 



DiccELOTUs, Wesm. 



Antennae of the female generally red or reddish at the base, the rest 

 dark ; the male has the basal joints pale beneath. Scutellum 

 black. 



A. Abdomen black; extreme apical margins of intermediate segments 



castaneous (females). 



a. Leers fuscous-black ; front femora and tibiae straw-coloured beneath. 



1. pumilus, 2 — 2^ lines. 



b. Legs reddish yellow ; hind coxae black. - Cameroni, 2 lines. 



B. Segments 2nd to 3rd or 4th red, most frequently with black dorsal 



marks (females). 



a. Hind coxae at least black, or at the base ; legs red. 



=»= Entire abdomen punctured ; all the coxae black. 3. parvuhis, 2 lines. 

 *=:= 1st segment smooth. - - - - 5. pusillator, 2 lines. 



b. Coxae and legs red. - - - - 4. rufiUmhatus, 2^ lines. 



C. Ditto (males). 



a. Front coxae or trochanters white or yellow. 



=•'■ Segments 2nd to 5th, apex and sides, red; 6th and 7th entirely red. 



1. puvdlus, 2|- lines. 



*=:= Segments 2nd to 4th red, mostly with dark dorsal marks ; margin of 



5th and 6th red. - . - - 2. rujicoxatus, 2 lines. 



b. Front coxae and trochanters black. - - 4. rufilhnhatus, 2-| lines. 



D. Segments 1st to 3rd red, 4th partly so, and generally the apical 



margin of the rest (female). 

 Legs red ; femora partly brown ; hind coxae with a black spot. 



2. rujicoxatus, 2|^ — 2| lines. 



The species of Diccelotus are but little known in Britain, 

 although D. pumilus is by no means rare. This species is figured 

 by Vollenhoven in his ' Schetsen,' (pt. i., pi. iii., fig. 14). The 

 closely-allied D. Cameroni is described in Trans. Ent. Soc. 



