271 



Rapports sommaires sur les Travaux accomplis dans les Laboratoires 

 et Comptes rendus des Missions d'Etudes. — Ann. Epiphyties, 

 Paris, vii (1919 & 1920), 1921, pp. 421-441. [Received 15th 

 March 1922.] 



The work of the entomological and pathological stations at Paris, 

 Mentone, Blois, Bordeaux, Montpellier, Saint-Genis-Laval and Rouen 

 are reviewed, much of the work recorded having been noticed in detail 

 in previous papers of this series. The Coccinellid, Cryptolaemus 

 montrouzieri, introduced from Australia [R.A.E., A, ix, 28], has 

 become successfully established and has produced a marked reduction 

 in the numbers of Pseudococcus citri. The introduction of Aphelinus 

 niali against Eriosoma lanigerum [R.A.E., A, ix, 476, 593, etc.] is 

 described. Attempts are being made to preserve the Hymenopterous 

 parasites of Phthorimaea operculella, introduced from America, by 

 feeding them on a collection of larvae of their host. 



A recent visit of M. Vayssiere to Morocco to study the question of 

 a disease of date palms has elicited the fact that Oryctes grypus, said 

 to be the cause of the disease, plays only a secondary role, the disease 

 not being primarily due to any insect pest. 



At Mentone, the rearing of Noviiis cardinalis has been continued, 

 and colonies are being distributed wherever Iceryapurchasi is abundant. 

 Attempts are also being made to introduce the Coccinellid, Hippo- 

 damia convergens, from California as a means of reducing the numbers 

 of various Aphids. 



At Blois a study has been made of Aphids, of which many injurious 

 species occur. Several species of Forda and Pentaphis, Paracletus 

 cimicifonnis, Heyd., and Tychea setulosa, Pass., living on the roots 

 of cereals, are incompletely understood and require further study. 

 A Pemphigid, Hamamelistes hetulae, Mordv., found on white birch, 

 has only three generations in a year, and seems to reproduce indefinitely 

 by parthenogenesis. The two summer generations, the first wingless, 

 the second composed of both winged and wingless individuals, are 

 found from late March to mid- June. The winter generation, appearing 

 at the end of May or June, lives as a larva in a dormant condition on 

 the shoots of birch and matures in the following spring, when repro- 

 duction continues. No sexual form has as yet been observed. The 

 species seems to be distinctly limited to a few localities, and as it has 

 been found near greenhouses it is questioned whether there may be, 

 every two, three, four or five years, a return to some greenhouse plant 

 where the sexuales live and the stem-mothers hatch from the winter 

 egg. It is hoped to determine this point by transporting some of the 

 insects on to trees far removed from greenhouses. It is hoped to rear 

 shortly the hitherto unknown sexuales of Vacima dryophila, Schr., 

 which lives on the tips of oak, and of Glyphina betulae, Koch, developing 

 on white birch. The genus Asiphum has apparently been represented 

 hitherto by only one species, namely, A. tremtdae, DeG., living on 

 Populus tremula ; in 1919 a new species was found on P. alba, and 

 will shortly be described. 



Cydia [Laspeyresia] conicolana, a Microlepidopteron new to France, 

 has been found injuring Salzmann pine in Herault, where the 

 Curculionid, Tanymecus palliatus^ has caused serious damage to 

 vines by cutting off the buds in April and May. The Pierid, Aporia 

 crataegi was also very abundant on young fruit-trees. Larvae were 

 observed about 27th May and fed in groups on the leaves, constructing 



