100 ENTOMOLOGICAL NEWS [April, '2O 



them from ocelli, ocellulae, and the simple eyes of larvae. 

 The simple eyes of larvae, the immature feeding stages of 

 entometabolous insects, are to be known as ocellarae. 



Ocellulae and ocellarae of each side of the head are usually 

 closely associated and are generally placed upon an area that 

 is very different in color or is more convex or elevated above 

 the adjacent parts of the cuticle. Each of these areas has 

 previously been designated as an ocularium. 



The pupae of insects with an entometabolous metamorpho 

 sis are never provided with eyes. In many species, where the 

 cuticle is thin and transparent, the developing compound 

 eyes and sometimes the ocelli of the adult, as already noted 

 in the nymphs of exometabolous insects, can be identified 

 through the cuticle. Such eyes or ocelli are never functional 

 in pupae and are incorrectly described or designated as the 

 eyes or ocelli of pupae as is sometimes done. 



A Mexican Species of Agrilus found in 

 Arizona (Coleoptera). 



By W. S. FISHER, U. S. Bureau of Entomology, 

 and ALAN S. NICOLAY, Brooklyn, New York. 



This species was described by Waterhouse (1889, Biol. 

 Centr.-Amer. Coleopt., vol. Ill, p. 119, tab. VII, figs. 7, ya) 

 from Pinos Altos, State of Chihuahua, Mexico, from a male 

 specimen. This species is remarkable for its sexual color 

 dimorphism, which as far as known, is not found in any of 

 our other North American species. As the female has never 

 been described and to assist those who have no access to the 

 works in which the Mexican species, herein recorded, is de- 

 scribed, we have given a description of the species, hoping it 

 will prove more useful than simply recording its appearance 

 in the United States. 



Agrilus restrictus Waterhouse. 



cf. Moderately elongate as in arcuatus, head, thorax and beneath 

 brassy; elytra slate color, shining. Antennae brassy, reaching to middle 



