167 



milling its way inwards and forming an oval cell in which it pupates. 

 The egg is usually laid in spring or summer, and the larva feeds and 

 rests until the autumn either of the same year or of the second or 

 third year before reaching maturity. It hibernates either in the 

 larval stage or in the adult stage in the pupal cell, the adult emerging 

 in the spring or summer. The beetle, after mating and oviposition, 

 dies before the end of summer. 



Certain species cause the formation of galls on the host-plant, 

 while others produce galls on some plants and not on others. The 

 common species of Agrilus infesting the alder causes galls in Oregon, 

 while it seldom does so in California. Although the usual food of 

 the adults is the foliage of the host-plant, some are pollen feeders 

 and some feed on the spores of fungi. Agrilus bilineatus is of some 

 benefit in destroying chestnut blight fungus ; Melanophila consputa, 

 Lee, has been observed devouring scorched termites on an old spruce 

 log. A key is given to the genera of Buprestid larvae, with particulars 

 of their distribution, habits and food-plants. 



A bibliography of nine works is appended. 



QuAiNTANCE (A. L.) & Baker (A. C). A Contribution to our Know- 

 ledge of the Whiteflies of the Subfamily Aleyrodinae (Aleyrodidae). 



— Separate, dated 20th January 1917, from Proc. U. S. Nat. 

 Mus., Washington, D.C., Vol. 51, pp. 335-445, 46 plates. 



This systematic paper is a continuation of the authors' previous 

 work on the Aleurodidae. Keys are given to the various species 

 of the different genera, eight new sub-genera being erected and 36 

 new species described. 



McGregor (E. A.). Descriptions of Seven New Species of Red Spiders. 



Separate, dated loth January 1917, from Proc. U.S. Nat. Mus., 

 Washington, D.C., Vol. 51, pp. 581-590, 7 plates. 



The species here described, which are of some economic importance, 

 are :■ — Tetranychus peruvianus on willow {Salix) in Peru ; the presence 

 of this mite causes the leaves to turn yellow and drop, but does not 

 appear greatly to injure the trees ; T. rusti attacking the foliage of 

 papaw [Carica papaya) in Peru ; T. monticolus found at an altitude 

 of 6,000 feet, on the leaves of large-berried huckleberry {Vaccinium 

 sp.) in Oregon ; this species causes considerable discoloration and 

 dropping of the leaves ; T. oregonensis on wild cherry {Prunus sp.) 

 in Oregon ;, T. willamettei on the leaves of the white oak {Quercus 

 lohata), to which it imparts a rusty appearance ia Oregon ; T. ilicis 

 on American holly {Ilex opaca) in S. Carolina ; and T. macdonoughi 

 injuring the leaves of Oxalis stricta in Florida. 



BoviNG (A.). A Generic Synopsis of the Coccinellid Larvae in the 

 United States National Museum, with a Description of the Larva of 



Hyperaspis binotafa, Say. — Separate, dated 15th January 1917, 

 from Proc. U.S. Nat. Mas., Washington, D.C., vol. 51, pp. 621- 

 650, 4 plates. 



This paper, the contents of which are indicated by the title, 

 supplements a former one by F. L. Simanton on H. binotata [see this 

 Review, Ser. A, iv, p. 282]. 



