THE CANADIAN ENTOMOLOGIST. 229 



ON THE GENUS RULANDUS, DISTANT, (HEMIPTERA). 



BY G. W. KIRKALDY, HONOLULU, HAWAIIAN ISLANDS. 



Rulandus, Distant (1904, Faun. Ind. Rli., II, 391), is described as a 

 Nabid, but it is most certainly not, as it has neither the facies nor the 

 characters of that family. It is a Reduviid, and judging from the figure 

 and description is probably a Reduviine proper (Acanthaspidine). 



STUDIES IN THE GENUS INCISALIA. 



BY JOHN H. COOK, ALBANY, N. Y. 



III. — Incisalia Henrici. 

 (Continued from page 187.) 



Incubation — Of the thirteen eggs secured from the female confined 

 over Vacchiiujn, seven were left on the growing plant and in the open air 

 to develop under natural conditions; the other six were brought into the 

 laboratory. When first laid the egg is pale green, showing under a low 

 power of the microscope the large white bosses studding the surface 

 except on the flattened top and bottom. As the larva develops within the 

 shell the latter becomes glistening white, the caterpillar appearing but 

 faintly through the nearly opaque pellicle. 



On May 19th, between 7.30 p.m. and the next observation, the first 

 egg (No. i) hatched. When found at 10.30 p.m. the larva had deserted 

 the empty shell and was feeding on a bud, the food showing through the 

 dorsum as a dark green line. A small hole was visible at the edge of the 

 circum-micropylar area of egg No. 3 (laid on V. corymbosnm), and at 

 11.12 p.m. the caterpillar, having eaten away the v/hole top of the shell, 

 emerged. Shortly afterward Nos. 2, 4 and 5 were punctured, and the 

 larvae emerged almost simultaneously at midnight. No. 6 did not hatch 

 until 9.30 the next morning. 



The eggs left out of doors did not develop so rapidly; Nos. 7, 8, g 

 and 10 hatched during the early morning, and No. 11 about 5 p.m. on 

 May 2 1 St. The larvse in Nos. 12 and 13 developed normally, but died 

 within the shell. 



The period of incubation, therefore, varies from 4 days 7 hours to 6 

 days 4 hours. Edwards gives as the " duration of this stage five or six 

 days." 



The Larval Stages. — Following are the tabulated records of the larvae 

 which lived long enough to make the determined facts of any value. The 



July, 1907 



