144 



this genus should occur in Morocco, and upon further examination 

 of Bigot's type, it is found that the insect belongs to the subgenus 

 Mesomyia, created by Macquart for some species taken out of the 

 genus Silvius, Meig. Some further individuals have been captured at 

 Tangiers, and a comparison of these with Meigen's specimens indicate 

 that D. maroccanus, Bigot, is the hitherto imknown male of Chrysops 

 singularis, Meig. This species has been considered to belong, first to 

 Chrysops and then to Nemoriits, but differs from both and should 

 undoubtedly be placed in the genus Mesomyia. 



Seguy (E). Notes synonymiques sur quelques Moustiques pale- 

 arctiques. — Bull. Sac. Ent. Fyance, Paris, 1921, no. 10, 25th May 

 1921, pp. 162-166. 



This paper is a collection of references to recent changes in synonymy 

 of Culicines, taken from the work of Lang, Martini, Wesenberg- 

 Lund, and Edwards. 



ZoTTA (G.). Sur la Transmission experimentale du Lcpiomonas pyrrho- 

 coris, Z., chez des Insectes divers. — C. R. Soc. Biol., Paris, Ixxxv, 

 no. 23, 25th June 1921, pp. 135-137. 



This paper records the results of experiments in the direct 

 inoculation of Leptornonas pyrrhocoris into the general cavity of 

 Galleria mellonella (caterpillar), Carausins morosiis, Calliphora sp., 

 and Tenebrio molitor (larvae), which have no flagellosis of their own, 

 and Notonecta glaitca and Navcoris cimicoidcs, which have a special 

 Leptomonad intestinal parasite. 



L. pyrrhocoris, the normal parasite of Pyrrhocoris apferiis, can be 

 successfully inoculated into A^. glaitca, N. cimico''ides, G. mellonella 

 (caterpillar), and Calliphora sp. In these the flagellates find an 

 excellent developmental medium and — especially in the larvae of T. 

 molitor and G. mellonella — multiply greatly after 24-36 hours. After a 

 few passages their virulence is so much increased that a small quantity 

 of infected blood suflices to reproduce the infection. The larvae of T. 

 molitor, and particularly those of G. mellonella, can resist the infection 

 for a somewhat long period, and by regular passages it is possible to 

 maintain the flagellates indefinitely in these insects. The caterpillar 

 of G. mellonella is an excellent laboratory reservoir of the virus. 



Infection was not achieved with the adult of Hydrophilits piceiis, and 

 a Phasmid, Carausins morosus, was also refractory, though the resis- 

 tance of the latter does not seem to be absolute and may break down 

 with a different technique. 



In insects liable to infection there occurs an intensive phagocytosis, 

 which is, however, unable to check the course of the infection. In 

 C. morosus, in which the infection does not succeed with certainty, 

 progressive degeneration of the flagellates free in the plasma points to 

 a marked humoral reaction side by side with the intense phagocytosis. 



The infection is usually fatal in the caterpillar of G. mellonella, and 

 though pupation often occurs, the pupae die. In T. molitor the infec- 

 tion persists through all stages, and the imagines always harbour 

 Leptomonads in their blood fluid. 



In order to speak of a true and definitive adaptation of L. pyrrhocoris 

 to the insects mentioned above it is necessary to achieve an infection 

 per OS as well. A paper on this subject will be published later. 



