Ernestia. 489 



curved forwards, narrow or broader and rounded or bifid at end; 

 in most species the arm issnes inwardly from a scale-like piece covering 

 its base. Legs with anterodorsal bristles on hind tibiæ quite unequal; 

 claws and pulvilli more or less elongated in male ; front tarsi in female 

 with the three or four last joints dilated, except in truncata. Wings 

 with first posterior cell more or less narrowly open, ending somewhat 

 before apex of wing; discai angle generally rectangular, without or 

 with a small veinlet; apical cross- vein more or less concave. Only 

 in truncata a costal spine. 



The species, for which hosts are known, are parasitic on Rho- 

 palocera and varioiis Heterocera] they belong to Pantel's group 4 

 and form a primary breathing hole. The larva bores out of the host 

 larva and pupates in the ground, where it hibernates. 



Of the genus about 35 palæarctic species are recorded, but 

 many are doubtful; 9 occur in Denmark. 



The genus falls in some divisions or subgenera, for our species 

 the following: 



1. Male without ocellar and vertical bristles . . Panzena'B.B.{rudis,Niélseni). 



— Ocellar and vertical bristles present in both 



sexes 2. 



2. Second antennal joint as long as or longer 



than third 3. 



— Third antennal joint longer than second 4. 



3. No Crossing apical scutellar bristles; acrosti- 

 chal bristles reduced; discai angle with a real 



veinlet Fausta R. D. [nemorum). 



— Crossing apical scutellar bristles present ; usual 



acrostichals present; no veinlet Eurythia R. D. [caesia). 



4. A præsutural intraalar bristle; costal spine 



present; female with front tarsi not dilated. . Afpendicia Stein, {truncata). 



— No præsutural intraalar bristle; no costal 



spine; female with front tarsi dilated Ernestia s. str. {vivida, con- 



nivens, conjugata, radicum). 



Table of Species. 



1. Ocellar and inner vertical bristles present in both sexes; an- 

 tennæ black, or if pale second joint as long as third 2. 



— No distinct ocellar or vertical bristles in male; antennæ in 

 male black or more or less pale, in female always more or 



less pale, third joint longer than second; palpi pale 8. 



2. Second antennal joint shorter than third 3. 



■ — ■ Second antennal joint longer than, or at all events as long 



as third 7. 



3. Thorax with a præsutural intraalar bristle; wings with a 



