ZOOLOGY AND BOTANY, MICEOSCOPY, ETC. 109 



exposed side of trees, the bryophytes on the less exposed. The results 

 have been set forth in tabulated form, and they record the formations 

 and associations of lichens on trees in many parts of the British Isles. 

 West has given the chief corticolous lichens approximately in the follow- 

 ing ratio : ParmeJia saxafils 6, F. fuliyimsa var. Jsetevirens 2, Lecanora 

 tartarea 2, Platysura (jlaucum 1, Pertusaria globi/Jif em with. P.faginea 

 and other species 1. Other species occur in great abundance here and 

 theie, Pijrenula nitida sometimes almost covering the smooth bark of 

 young trees ; Qrcqilm elegmis taking complete possession of the stems of 

 hollies. 



Lichens of New Caledonia.*— A short series of these have been 

 determined by J. Harmand. Most of them are cosmopolitan species, 

 while others are more distinctly Australian. A new variety, iaUUostt; 

 of Pannaria parmeUoides is described, and new varieties of RamaUmc 

 denticidatff and of Usner/ (trUcidata, the latter variety depending on the 

 reaction with potash. Localities and distribution are given, and there is 

 a fine photograph of the Australian Gladonia reUfora. 



Lichen Flora of Southern California.t — H. E. Basse lists a number 

 of lichens from the hilly regions of California, especially the Santa 

 Monica range. None of them are new species, but many are new to the 

 country. Notes are given with most of the species. 



Schizophy ta . 

 Schizomycetes. 



Locust Destruction in Morocco. J — M. Beguet has conducted a 

 series of successful experiments in 1913 and 1914 on the effects of 

 pulverized cultures of Corcobarilhis acridiorwm (d'Herelle) on infesta- 

 tions by the Moroccan locust, Stauronotus maroccanus, in Algiers. The 

 methods employed did not provide an immediate means of protecting 

 the harvests from the depredations of these insects, but acccording as 

 the locusts were destroyed during the campaign so the chances of 

 • successful combat during the following season were increased. Thus 

 during successive campaigns a sensible reduction of the foci of invasion 

 reasonably might be expected. Even where the induced infection did 

 not prove fatal to the insects, a state of morbidity was produced which 

 rendered the animals sluggish and enfeebled, thus becoming a ready 

 prey to the customary methods of locust destruction. By employing 

 insufflations of the coccobacillus the campaign of destruction can be 

 prolonged by over a month, thus covering the egg-laying period. The 

 author concludes that there is a real economic gain in adding this 

 weapon to the approved means of mechanical destruction called for by 

 experience. The biological procedure is not destined to replace these 

 mechanical means, but rather to act as a useful adjuvant. 



* Sarasin and Roux, Nova Caledonia Kreidel, Wiesbaden, 1914, pp. 7-15 (1 pi.). 



t Bryologist, xviii. (1915) pp. 92-4. 



X Ann. Inst. Pastour, xxix. (1915) pp. 520-36. 



