INTRODUCTORY PAPERS ON ICHNEUMONID^. 131 



AuTOMALus, Wesm. 



Thorax black; scutellura white ; abdomen blue-black, apical 

 margin of 1st segment and an oblong spot on the 7th, 

 white ; tibiae partly pale-marked, alboguttatus, 6 — 8 lines. 



Taschenberg, Holmgren, Brischke, and Tischbein, retain 

 Wesmael's genus, as did Marshall in his first Catalogue ; but 

 later he again places A. alboguttatus, Gr., in Tragus. This 

 species is common in Britain, and Tischbein relates that one 

 warm day in June he met with a swarm of from thirty to forty 

 specimens on a spot of ground less than two feet in diameter in a 

 wooded enclosure, near the castle of Schaumburg on the Lahn 

 (Khenish Prussia). He examined the spot closely, but could find 

 no pupae or cocoons from which they could have been bred, nor 

 anything to account for the curious assemblage (Stett. Ent. 

 Zeit., XXXV., 298). Boie, Ratzeburg, Brischke, and Giraud, record 

 this species as a parasite of Orgyia j^udihunda ; Vollenhoven has 

 bred it from Thyatira hatis, and also, doubtfully, from Liparis 

 auriflua. Of the seventeen specimens in tlie National Collection 

 there is one (imperfect) which Mr. Desvignes considered distinct. 

 Foerster erected the genera Trogus, Automalus, and Dinotomus 

 (new), into a new family — Trogoidae (Verh. Pr. Rheinl., xxv., 188). 

 This appears quite unnecessary. 



Anisobas, Wesm. 



Abdomen, 1st to 3rd segments red or marked with black ; 

 more or less of the apical segments marked w^th white ; 

 greater part of legs red ; antennae of female white-ringed, 

 and sometimes the male also ; scutellum sometimes white, 

 sometimes black. - - 1. JiostiUs, 3|- — -i^ lines. 



LiSTRODROMUs, Wcsm. 



Basal segments of the abdomen with a pale spot on each side ; 

 4th to 7th pale. 



A. Scutellum, and marks on abdomen, yellow ; antennae, and 



tibiae of the female, red, tibiae of the male yellow, apex of 

 hinder dark ; scutellum of male black. 



1. quinqueguttat'us, 3|- lines. 



B. Marks on abdomen white ; thorax of female more or less red ; 



scutellum of male black ; legs dark, front legs partly pale. 



2. lapidator, 2^ — 3|- lines. 



The Listrodromoidae formed another of Foerster's new families 

 (Verh. Pr. Rheinl., xxv., 191) ; it included the two genera, 



