100 MEMOIRS OF THE NATIONAL ACADEMY OF SCIENCES. 



Grenier (Ann. Soc. Ent. France, 4 e serie, tome iv, pp. 137 to 140) has some observations on 

 the traces of eyes in beetles reputed blind. Having found indications of eyes in Anophthalmus, 

 he examined the'otber blind beetles, and found in Aphsenops an excessively minute surface mark- 

 ing the position of the visual organ. In Leptoderus, Adelops, etc., no trace of an eye can be 

 detected, but in Glyptomerus cavicola there is a very small one, presenting no facets, but distin- 

 guishable by its pale color. He suggests that in many cases the internal portions of the organs 

 of vision may be sufficiently developed to enable these insects to perceive the faint rays of light that 

 may find their way into the caverns ; in others, however, it has been found that the visual nerves 

 are either wanting or rudimentary, indicating that the sense of sight can hardly be exercised by 

 these. Further observations on tbe anatomy of this part of the nervous system in the blind 

 beetles inhabiting dark caverns and ants' nests are very desirable. 



Order Siphonaptepa. 



JJystricliopsylla obhisiceps (Kits). Eyes absent. 



Typhlopsylla octactenus (KoL). 



Typhlopsylla ccmcasica Tasch. (=Pulex typhlus Motsch.,from Spalax typhlus). 



Typhlopaylla assimilis Tasch. (? — Pulex talpw Boucu6). 



Typhlopsylla gracilis Tasch. (? = P. talpw Bouch6, nee Curtis): Eyes absent or rudimentary. 



Order Diptera. 



Family Polyctenidae. 

 Euctenocles miraWis Waterliouse. Allied to Strebla. 



Order Hymenoptera. 



Family Chalcididae. 



Eupristitia S. Saunders. The male has neither eyes nor ocelli, while the female has large eyes. 



Anthophorabia fasciata and A. retusar Newport. While the females have normal compound eyes, in the males 

 the compound eyes are reduced to a minute simple one, and the wings are rudimentary. The species live 

 in the darkness of the cells of Anthophora. The males probably do not leave the cells to impregnate the 

 female, which are active, going from one nest to another. (See Newport, Mem. Linn. Soc, xxi, 81, 82.) 



Ceratosolen Mayr. " Die Augen sehr klein oder fehlend " (Mayr), 



Family Formicidae. 



Eciton (occasionally). (In these genera the workers alone are eyeless.) 



Typhlatta. 



Liomyrmex coeca (Smith). Eyes and ocelli wanting. 



Tijphlomyrmex. 



Syscia Eog. 



Amblypone Frichs. 



Mystrium Eog. 



Myopone Rog. 



iStrigmatomma Rog. 



Ponera. 



Anomma Shuck. 



Labidws* 



Typhlopone Westw. Subterranean in their mode of life, like Termes (Mayr). 



Bhogmus Shuck.* 



Mnictns Shuck.* 



DicMhadia* 



Dorylus F. 



BicMliaAia Gerst. 



* Workers unknown, though supposed to be eyeless. " I believe that Eciton is now supposed to comprise the 

 workers of Labidus," states Mr. L. O. Howard, who has materially aided me in completing this list of Hymenoptera. 



