446 The Ohio Naturalist [Vol. Ill, No. 8, 



This lot of cocoons were supposedly all of the same species. 

 That the}' were of different species was not known, until, on be- 

 ing opened, the two different species were found. Under the cir- 

 cumstances, the suggestion is inevitable that these must be male 

 and female of one and the same species. The genus Labeo has 

 heretofore been known only in the male sex. Ashmead being of 

 the opinion that it represents the males of the genus Gonatopus. 

 Gonatopus has wingless females, and only the females are known. 

 Now, the difference in size and structure between Labeo and Dry- 

 inus are less than those between Labeo and Gonatopus. 



Furthermore, if these specimens taken from the same lot of 

 cocoons were of two distinct species, it seems strange that males 

 and females should have occurred in about equal numbers (6 and 

 8 rcspectivehO, and that the males should all be of one species, 

 while the females were all of the other. The evidence being, 

 then, that these are one species, and since typhlocybae has prior- 

 ity, the s^'nonomy will stand : — 

 Dryinus typhlocybae (Ashm.). 



Labco typhlocybcs Ashm., Bui. 45, U. S. Nat. Mas., p. 89, 1S93. 

 Jhvimis onnenidis Ashin., Ent. News, XIV, p. 192, 1903. 



III. Cheiloxeurus swezeyi Ashm. 



Family — Encyrtidse. 

 Sub-family — Enc3'rtince. 



Entomological News, XIV, p. 193, 1903. 



February 18, 1903, fourteen adults (Plate 21, Figs. 3, 4) of 

 this chalcid-fly were found in the box containing the lot of leaves 

 having the Dryinus ormenidis cocoons, previously mentioned in 

 this article. Not knowing their source, it was supposed that they 

 came from the Dryinus cocoons. Examination disclosed three 

 Dryinus cocoons which were open, some insect or insects having 

 escaped from them. No other insects being present, it was 

 inferred that the Chalcids came from these three cocoons. 



In opening cocoons and liberating adults of Dryinus and Labeo, 

 as previously mentioned, one cocoon was found containing four 

 pupae (Plate 21, Figs. 5, 6), which in size and general structure, 

 and particularly in shape of antennae and the presence of tibial 

 spines and spurs, identified them as the pupae of the adult chal- 

 cids found in the same box. These chalcid pupae were not 

 enclosed in cocoons of their own. Another Dryinus cocoon con- 

 tained five larvae, which are probably Cheiloneurus larvae. 



This is rather insulhcient data upon which to outline the Life 

 History of this insect ; but, in general, it probably is about as 

 follows: The eggs most likely are deposited by the female punct- 

 uring the cocoon of Dryinus, during August ; that is, soon after 

 the cocoon is formed. A reason for thinking that the eggs are 



