468 



has not been seen. It has been observed on 5. riigosa, S. nemoralis^ 

 S. canadensis, and S. altissima, and also on Eupatorium serotinum and 

 E. perfoliatum. 



On the bodies of dead beetles a fungus, Sporotrichum glohuliferum, 

 has been found, but observations indicate that it cannot destroy 

 healthy beetles. 



Some adult borers were collected in April from the trunks of locust 

 trees left lying on the ground. The males tend to resemble the hickory 

 borer, C. picta, though the females are more like C. rohiniae. The 

 following alternatives may possibly explain the relations of the spring 

 form of these beetles with those so common on goldenrod and locust 

 trees in the autumn : (1) there are two distinct species, one living 

 on hickory and walnut, appearing as adults in the spring, and 

 the other living on locust and appearing as adults in the autumn ; 

 (2) there are two forms of one species, one appearing as adults in spring 

 on locust, hickory and walnut, the other appearing as adults in the 

 autumn on locust only ; (3) there are two generations of the same 

 species, one maturing in spring, the other in the autumn, the latter 

 in no way differing from the former. The author is inclined to favour 

 the second of these hypotheses. 



UicHANco (L. B.). Musculature and Mechanism of Movement of the 

 Tarsi in Aphids. — Psyche, Boston, Mass., xxviii, no. 3, June 1921,. 

 pp. 63-69, 1 plate. 



The contents of this paper are indicated by its title. 



MuiR (F.). Cyrtorhinus in Hawaii and some Factors acting against it. 



— Hawaiian Planters' Record, Honolulu, xxiv, no. 6, June 1921, 

 pp. 285-286. 



The first colony of the Capsid bug, Cyrtorhinus mundulus, liberated 

 in July 1920, disappeared after producing one generation. Subsequent 

 colonies in Hawaii have maintained themselves for several generations, 

 but have not spread to any extent. 



Experiments have proved that neither climatic conditions, nor the 

 egg-parasite {Paranagrus optahilis) of the leaf-hopper [Perkinsiella 

 saccharicida] are harmful to C. mundulus, but investigations in cane 

 fields for insects likely to attack it in any stage have attracted attention 

 to Zelus renardii. This Reduviid bug is predaceous on leaf-hoppers, 

 but it also attacks Coccinellids and other beneficial insects, and was 

 probably responsible for the destruction of Micromus vinacetis, which 

 was introduced from Australia against Aphids. It came originally from 

 California, where there are five species of the genus. It is suggested 

 that experiments should be made with any parasites of Z. renardii 

 that may be found in California. 



Pemberton (C. E.). The Fig Wasp and its Relation to the Develop- 

 ment of Fertile Seed in the Moreton Bay Fig.— Hawaiian Planters' 

 Record, Honolulu, xxiv, no. 6, June 1921, pp. 297-319, 8 plates. 



This paper describes in detail the vital part played by the fig wasp 

 in the production of fertile seed of the Australian fig, Ficus macro- 

 phylla, and emphasises the necessity of introducing this insect if this 

 tree is to be permanently added to the Hawaiian forests. 



