Figures 105-118 



105. Two unhatched egg masses of M. californicum pluviale laid near base of 

 trunk of a small tree. Brown spumaline. 2.5 X. 



106. Hatched egg mass of .\/. tigris. Note the lack of spumaline covering 

 the eggs. 3.5 X. 



107. Unhatched egg mass of M. constrictum austrinum. somewhat smaller 

 than normal. Top egg mass with spumaline removed. Note that the eggs are 

 visible beneath the clear, yellowish spumaline. 2.5 X. 



108. Unhatched, abnormal egg mass of M. disstria w ith dark brown spuma- 

 line removed to show how the eggs are laid as a helical band. 4X . See figure 113. 



109. Unhatched egg mass of M. americanum laid on a small twig, with dark 

 brown spumaline partially removed to show the distinct beginning and end 

 of the e^g mass (on either side of the dark streak at the left side). The spu- 

 maline normally would obscure the beginning and end of an egg mass laid 

 on a twig this small. Near Green Bay, Wisconsin. 1.5 X. 



1 10. Hatched egg mass of M. americanum laid on a larger branch, and clearly 

 showing the beginning and end. The spumaline normally would not obscure 

 completely the beginning and end of such an egg mass. Also note the much 

 lighter color of the eggs when compared with figure 109, after at least one 

 year of exposure under field conditions. Near Fredericksburg, Texas. 2.5 X. 



111. A nearly flat, unhatched egg mass of M. americanum laid near the base 

 of the trunk of a small tree. The beginning and end are clearly visible. Near 

 Grantsburg, Wisconsin. 2 X . 



112. Unhatched egg mass of M. californicum laid relatively flat on a large 

 branch. Near Salt Lake City, Utah. 2X. 



113. Normal, unhatched egg mass of A/, disstria. 2.5 X. See figure 108. 



114. Unhatched egg mass of M. incurvum aztecum covered with the very 

 dark brownish-black spumaline that also is found occasionally on egg masses 

 of A/, incurvum incurvum from southern Arizona. 2X. See figure 117. 



115. Hatched egg mass of M. californicum californicum from near San Fran- 

 cisco Bay, California, showing individual emergence holes through the rela- 

 tively collapsed, brown spumaline that frequently is found in Pacific Coast 

 populations of M. californicum. 2X. See figure 1 16. 



1 1 6. Hatched egg mass of M. californicum from central Nevada showing the 

 lack of individual emergence holes in the spumaline. This situation is usually 

 found in populations of A/, califorfiicurn other than those from the Pacific coast. 

 Some spumaline removed at left center. 2X. See figure 115. 



1 1 7. Hatched egg mass of M. incurvum incurvum showing the pale, nearly 

 white spumaline usually found on egg masses of incurvum in the United States. 

 2X. See figure 114. 



118. Photomicrograph of hand-cut section of the spumaline contained in 

 the reservoirs of the accessory glands of a preserved female M. californicum 

 fragile from Morongo Valley, California, showing the specks. Note the variable 

 size of those specks which are reasonably sharp, indicating the size is not 

 constant. 320 X. 



221 



