Garcelia. 379 



Baer, Zeitschr. f. angew. Ent. 144. — ■ Tachina lucorum Meig. p. p. 1824. Syst. 

 Beschr. IV, 328, 154 et 1838. VII, 256, 17 (Exorista). — 1900. Villen. Bull. Soc. 

 Ent. de Fr. 158, 8. — 1924. Stein, Arch. f. Naturgesch. 90, 6, 64, 5. — Tachina 

 fjnava Meig. p. p. 1824. 1. c. IV, 330, 156 et 1838. VII, 255, 1 {Exorista). — 

 Exorista comata Kond. 1859. l.c. III, 137, 22. — Exorista hiserialis 1862. Schin. 

 F. A. I, 461. — 1907. Villen. Wien. Ent. Zeitg. XXVI, 254, 37 (Parexorista) . — 

 Parexorista dubia B. B. 1891. l.c. LVIII, 322. 



Male. Similar to gnava. Frons above not half as broad as the 

 eye. Head coloured as in gnava. Frontal bristles descending fully 

 to the end of second antennal joint, those on the cheeks nearer to 

 epistoma than to the eye. Antennæ with third joint about thrice as 

 long as second; arista thickened in about basal third. Thorax as in 

 gnava, and abdomen coloured in the same way; the red markings 

 sometimes nearly absent. Second segment with a pair or more, third 

 with four and fourth with a row of marginal bristles ; third and fourth 

 with somewhat numerous, more or less strong discai bristles. Genitalia 

 mainly as in gnava, upper forceps distinctly divided into two arms. 

 Legs black with tibiæ yellow, with base and apex blackish on ventral 

 side; hind coxæ with small bristly hairs behind at apex; front tibiæ 

 with two posteroventral bristles and middle tibiæ with ventral bristle. 

 Wings almost clear; veins blackish; discai angle rectangular. 



Female. Similar; frons not as broad as the eye. Abdomen with 

 the discai bristles stronger than in male. 



Length 8 — 8,5 mm. 



C. cheloniae has been taken only at Tisvilde and one specimen 

 in Jutland at Sønderborg (Wtistnei); the specimens from Tisvilde 

 were bred from Malacosoma castrensis; it is otherwise known from 

 a great number of Heterocera and also from Tenthredinids. Nielsen 

 has treated its biology (Entom. Medd. 2, IV, 1909, 56, under the 

 name of gnava, see correction in Vidensk. Medd. fra Dansk naturh. 

 Foren. 1911, 1, where he declares, that the eggs described do not 

 belong to this species); 2 — 5 parasites developed in each host. The 

 pupation takes place in the host pupa and the pupa hibernates. 

 Nielsen bred imagines on ^^j-j', the species has only one yearly brood. 



Remarks: It is curious that no material from Nielsen exists, 

 and as the species is only known as Danish from his breadings, be- 

 sides the mentioned specimen from Sønderborg, we possess at present 

 only this latter specimen; as the species was determined by Dr. Ville- 

 neuve, there can, however, be no doubt as to its identity. The above 

 description is drawn from French specimens, kindly sent me from 

 Dr. Villeneuve. — I have cited lucorum Stein under the present 



