Winthemia. 369 



little smaller, also the lateral a little smaller. Two sternopleural 

 bristles, or in amoena (subgenus Chaetolyga) three. Above on ptero- 

 pleura a bristle, Abdomen short ovate, rather flat; second segment 

 with the excavation reaching hind margin; only marginal bristles, 

 generally a pair on second segment, sometimes more, on the other 

 hånd sometimes wanting. Fifth segment with two rows. Genitalia 

 small and partly hidden; upper forceps and arms of lower forceps 

 elongated triangular, the upper a little longer than lower. Legs not 

 strong; hind tibiæ with a characteristic anterodorsal f ringe of medium 

 long, dense bristles, with or without a longer bristle; claws and 

 pulvilli in male somewhat or strongly elongated ; front tarsi in female 

 simple. Wings with first posterior cell open, ånding before apex of 

 wing; discai vein bent angularly, without veinlet, apical cross- vein 

 not much curved or nearly straight; no costal spine. 



The species are parasitic on Rhopalocera and Heterocera; they 

 belong to Pantel's group 1 and the larva gets air through a primary 

 hole. One to a very large number of parasites may be present in one 

 host larva. The larva bores out of the host larva, or rarely of the 

 pupa, and pupates and hibernates in the ground. 



About 15 European species are recorded; 4 have been found in 

 Denmark. 



Table of Species. 



1. Three sternopleural bristles; male with a strong, 

 reclinate upper frontal bristle; apex of abdomen 



black {Chaetolyga Rond.) 1. amoena. 



— Two sternopleural bristles; male with no reclinate 

 upper frontal bristle; apex of abdomen more or less 



red ( Winthemia s. str.) 2. 



2. Abdomen almost quite yellow; hairs on cheeks scarcely 

 reaching to the vibrissæ 2. speciosa. 



— Abdomen darker, and when red, at least with a broad 

 black middle line; hairs on cheeks reaching to the 

 vibrissæ 3. 



3. Thorax with four black stripes ; abdomen black, in male 

 with distinct, in female with small or no red side 



markings 3. quadripustulata. 



— Thorax with five black stripes; abdomen in both sexes 



red with a broad black middle stripe i. xanthogastra. 



1. W. amoena Meig. 



1824. Meig. Syst. Beschr. IV, 264, 43 {Tachina) et 1838. VII, 221, 14 

 {Nemoraea). — 1862. Schin. F. A. I, 453 {Nemoraea). — 1893. B. B. Denkschr. 

 Akad. Wiss. Wien, LX, 184. — 1896. Pand. Eev. Entom. XV, 14, 16, p. p. 



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