390 C. H. TURNEB 



cavity for the reception of the egg. The drilling is accom- 

 plished by thrusting and rotating the ovipositor. After oviposit- 

 ing, an adhesive substance is discharged, which is kneaded about 

 the egg by the ovipositor. After withdrawing her ovipositor, 

 the cricket reverses her position and completes the process by 

 capping the opening with small pieces of bark, which are held 

 in place by the mucilaginous substance surrounding the egg. 

 The time required for the process varies with the species, and, 

 to a lesser extent, with the individual. In apple-wood one and 

 one-half inches in diameter, O. niveus spent seven to sixteen 

 minutes gnawing the hole, twenty-seven to seventy-six minutes 

 drilling with her ovipositor and three to five minutes depositing 

 and disguising the egg. In ovipositing in raspberries, O. nigri- 

 cornis spent five to eleven minutes gnawing the bark, twelve 

 to seventeen minutes boring with her ovipositor and five to 

 seven minutes laying and disguising the egg. 



In the summer of 1908, Paul Lozinsky (33) found, in a semi- 

 dark place, a glass tube 147 mm. long and 7.5 mm. in diameter, 

 which contained a nest of Osmia bicornis L. The nest consisted 

 of nine full cells and one which had been sealed empty. 



The larvae of Mecistogaster modestus have been observed by 

 P. P. Calvert (16) living in water between the leaves of epiphitic 

 bromelids. This mode of life Calvert thinks originated in the 

 accidental laying of eggs in the bromelids at a time when the 

 level of the water had been raised by floods. After the plant is 

 again far above the water the association still persists. 



E. A. Andrews (9) writes that the chief areas of termite activ- 

 ities are the nest, the arcades and the feeding grounds. The 

 arcades are closed archways that extend from the nest for a 

 distance of about fifty feet. Through these arcades the ter- 

 mites move to and fro in groups. No description is furnished 

 of the construction of the nest; but a detailed description is 

 given of the method of constructing and repairing the arcades. 

 There are four steps in the construction of an arcade: estab 

 lishing the path ; adding to the path, at irregular intervals, sec 

 tions of two parallel walls; filling in the gaps in these walls; 

 adding a roof to the walls. The wall is constructed of vegetable 

 matter that is cemented with anal discharges. A female adds 

 a mouthful of material; then, turning, cements and glazes it 

 with a fluid which she squirts from her anus. In some cases 



