March, 1910.] OlSEN : NOTES ON BREEDING HeMIPTERA. 39 



segments. Its characters are sufficiently indicated by Champion. 

 Milyas spinicoUis Champ. 



This was collected by Professor E. B. Wilson, of Columbia Uni- 

 versity, in the Grand Canon of the Colorado along Bright Angel 

 Trail. 

 Milyas inermis Champ. 



Collected by Dr. Henry Skinner and by Mr. C. Schaeffer, of the 

 Brooklyn Museum, in the Huachuca Mts., Arizona, to the former 

 of whom I am indebted for a specimen. This and the preceding 

 species agree in every particular with Champion's descriptions and 

 figures in the Biologia Centrali-Americana. 



NOTES ON BREEDING HEMIPTERA. 



By Chris. E. Olsen, 

 Maspeth, Long Island, N. Y. 



1. Cosmopepla carnifex Fabr. 



During the summer I found a number of Hemipterous nymphs of 

 this species in their last instar feeding on moth mullein {Verhascum 

 blattaria). In a few days they matured and proved to be the common 

 Cosmopepla carnifex Fabr. The bred specimens and others freshly 

 collected were placed on a moth mullein in a pot covered with a wire 

 screen. The first egg mass was laid on the screen. The youngsters 

 were not able to locate the food plant and soon died. The plant 

 itself did not thrive indoors, so thereafter I supplied freshly picked 

 leaves each day, confining the insects in a pint jar covered with 

 muslin. Eggs were deposited in very irregular masses, 4 to 15 per 

 mass, on any part of the plant which the mothers chose on the upper 

 or under side of the leaf, stem, seed pod or flower bud. In all I 

 secured 69 eggs, but these were deposited by more than one mother. 

 August 20 a batch of eggs was laid on the stem evenly in almost 

 straight lines, two by two. This was rather unusual. They were 

 light apple green, translucent, resembling in nature white grapes, but 

 less oval, more cylindrical, rounding quickly at the ends. The color 

 gradually turned yellowish as the embryo developed and all hatched 



