Geometridae 



The insect flies in Colorado and adjoining States. 



(4) Macaria praeatomata Haworth, Plate XLIII, Fig. 40, 2. 



Syn. consepta Walker. 



Not a rare species in the Atlantic States. 



(5) Macaria glomeraria Grote, Plate XLIV, Fig. 3, ? . 

 The range of this species is the same as that of the preceding. 



FIG. 202. Cymatophora ri- 

 bearia, <j> . \. (After Riley.) 



Genus -CYMATOPHORA Hiibner 



(i) Cymatophora ribearia Fitch, Plate XLIII, Fig. 45, ? . 

 (The Gooseberry Span-worm.) 



Syn. sigmaria Guene"e; annisaria Walker; aniusaria Walker; grossulariata 

 Saunders. 



The gooseberry and the currant are subject in the United 

 States and Canada to the attack of various insects, which do a 

 great deal of damage to them. One of the most frequent causes 

 of injury to these plants are the larvae of 

 the Gooseberry Span-worm, which is 

 represented in Fig. 204. It is, when 

 mature, about an inch in length, bright 

 yellow in color, marked with dark-brown 

 spots upon the segments. The eggs, 

 which are laid by the mature female at 

 the end of June or the beginning of July, 

 are very minute, but upon examination 

 under the microscope are seen to be beautifully ornamented with 

 deep pits or sculpturings. They are pale bluish-green. The eggs 

 are attached by the female to the stems and branches of the plants, 

 not far from the ground. Being almost 

 microscopic in size, they readily elude 

 observation, and this, it is known, accounts 

 for the fact that the insects are often, by the 

 transplantation of the shrubs, transferred 

 from one locality to another in which they 

 have been previously unknown. The eggs, 

 having been laid, remain through the sum- 

 mer and fall and all of the succeeding winter 

 in a dormant state, and do not hatch until 

 early in the following spring, when the 

 leaves are beginning to put out upon the bushes. As soon as the 



340 



FIG. 203. Egg of 

 Gooseberry Span-worm. 

 a, enlarged ; b, natural 

 size. (After Riley.) 



