72 CALIFORNIA ACADEMY OF SCIENCES. [Proc. 3D Ser. 



Type in the Entomological Collection of Leland Stanford 

 Jr. University, and co-types in the author's collection. 



Genus Diaspis Costa. 

 49. Diaspis pentagona Targ.-Tozz. 



Diaspis patelliformis Sasaki, Bull. Agric. College, Tokyo, 1894, pp. 107-124. 

 Diaspis amygdali Tryon. Craw, Rept. Calif. State Board Hort., 1895-96, 



p. 38. 

 Diaspis amygdali var. rubra Maskell, Trans. & Proc. New Zealand Inst., 



Vol. XXX, 1897, p. 228. 

 Diaspis amygdali Webster, Can. Ent., Vol. XXX, 1898, p. 79 and Vol. 



XXXI, 1899. 

 Diaspis amygdali Cooley, Can. Ent., Vol. XXX, 1898, p. 232. 

 Diaspis lanatus Morg. & Ckll. Craw, Rept. Calif. State Bd. Hort., 



1895-96, p. 29; and 1S97-98, p. 106. 



This scale insect is widely distributed, being found in 

 nearly every province of Japan. It is the worst pest of the 

 mulberry, fruit, and ornamental trees. In many places the 

 mulberry-trees were dying from its effects. The insect 

 generally attacks the lower part of the trunk, near the 

 ground, although it often covers the entire surface of limbs 

 and branches, as well as the trunk, and often can be seen 

 from a great distance. It predominates in shady places 

 which are not much exposed to sun or wind. 



A. Craw, San Francisco, has recorded this insect from 

 time to time on plum, persimmon, peach, cherry, and 

 walnut-trees from Japan; Prof. Webster, Wooster, Ohio, 

 has recorded it on flowering cherry (Primus -pendula), and 

 P. -pseiido-cerasus, from that country; and Mr. Cooley, 

 Mass., also found this insect on Prunus niume and P. sub- 

 hirtella, which were also imported from Japan. 



The author found it on the following hosts : yuglans sieb- 

 oldeana (Onigurumi), Prunus -pseudo-cerasus var. sieboldi 

 (Yoshino-zakura), Prunus buergeriana (Inn-zakura), Uhnus 

 sp., mulberry-tree (Kuwa), Paulownia imperialis (Kiri), 

 Zanthoxylum -piperitum (Sansho), Prunus persica var. vul- 

 garis (Momo), cherry-tree (Sakura), pear-tree (Nashi), 

 grape (Budo), Diospyros ^«>^/(Kaki), Broussonetia kazinoki 



