Hebia. 401 



R. antiqua is common in Denmark; Copenhagen and Frederiks- 

 berg Have, Damhussø, Hellerup, Ordrup, Gentofte, Dyrehaven, 

 Lyngby Mose, Geel Skov, Egebæks Vang, Sletten, Humlebæk, Lave 

 Skov near Helsingør; on Langeland at Lohals; on Lolland at Nysted, 

 and in Jutland at Sønderborg, Hov, and Frederikshavn; the dates 

 are ^^/g — "/g. The species is parasitic on Forficula tomis (non Danish) 

 and auricularia, further on Taeniocampa miniosa and Lymantria 

 dispar, but it seems especially to attack the Forficulids. Nielsen has 

 (Meddel, fra Dansk naturh. Foren. 66, 1915, 211) treated its biology; 

 he bred it from F. auricularia, both from larvæ and imagines. In 

 each host one parasite developed. It is curious, that the larva was 

 found free in the host, not iying with the posterior end in a funnel. 

 The Forficula was taken in the beginning of August ; the larvæ bored 

 out of the host between head and thorax or thorax and abdomen, 

 and the imagines came on ^"/g — ^Is- It is rather probable that the 

 species has two broods in the year, the spring brood perhaps living 

 in a lepidopterous larva. 



Geographical distribution: — All Europe; towards the north 

 to middle Sweden. 



89. Hebia R. D. 



Species of medium or smallish size, colour dark, grey pruinose. 

 The genus is nearly related to Rhacodineura, and in most respects 

 similar to it. Head as in this genus, but more flat behind and jowls 

 more than half the height of the eye. Occiput without black hairs 

 behind postocular bristles. Vibrissæ ascending to two thirds of the 

 height, distant and somewhat strong. Eyes bare, Epistoma deeply 

 concave, however less than in Rhacodineura. Antennæ as in Rhaco- 

 dineura. Thorax with four postsutural dorsocentrals. Scutellum with 

 three marginal bristles on each side as the apical are minute or 

 wanting. Abdomen with discai and marginal bristles, on second 

 segment a pair of marginal. Wings as in Rhacodineura, but apical 

 cross- vein normally developed; costal spine small. 



The development does not seem to be known, one of my specimens 

 is, however, bred from a Cidaria; the species is recorded as belonging 

 to Pantel's group 2 (Thompson 1924). 



Of the genus only one sure species is recorded, also occurring 

 in Denmark. 



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