228 INSECTA. 



and unites at the exterior margin, before the callous point. The first 

 joint of the intermediate tarsi is large, and ciliated beneath *. 



Encrytus, Lat., 

 Where that nervure is straight and unites at the callous point, or 

 rather at the branch which commences the cubital cell. The club of 

 the antennae is compressed and truncated at the end \. 



Spalangia, Lat., 

 Distinguished from the preceding by the generally longer antennae, 

 which are inserted close to the anterior margin of the head J. 



EuLOPHus, Geoff. Lat. — Entodon, Dalm. 



But from five to eight joints in the antennae; those of tlie males 

 ramous §. 



In the fifth tribe, that of the Oxiuri, Lat., we observe species simi- 

 lar to the preceding in the absence of nervures in the inferior wings, 

 and in which the abdomen of the females is terminated by a tubular 

 and conical ovipositor, sometimes internal, exertile, and protruding 

 through the anus like a sting, and sometimes external, and forming a 

 sort of tail or terminal point. The antennae are composed of from 

 ten to fifteen joints, and are either filiform or somewhat largest near 

 the end, or clavate in the females. The maxillary palpi of several are 

 long and pendent. 



We reduce the various genera of which it is composed to one, the 

 Bethylus, Lat. Fab. 



The habits of these Insects are probably those of the Chalcidiae; 

 but as most of them are found on the sand or low plants, I suspect 

 that their larvae live in the ground. 



Some have brachial cells or nervures in the superior wings. Their 

 maxillary palpi are always salient. Their antennae are filiform, or 

 simply and gradually enlarge in both sexes. 



Here they are inserted near the mouth. 



Dryinus, Lat. — Gonatopus, Kliig., 

 Where the antennae are straight, and consist of ten joints in the 

 two sexes, the last ones somewhat thicker than the others. The 

 thorax is divided into two knots. The anterior tarsi terminate by 

 two large dentated hooks, one of which is flexed. Some of the fe- 

 males are apterous |[. 



* Dalm., Monog. of the Pteromalini. 



t Lat., Gener. Crust, et Insect., IV, 31. 



+ Lat Ibid., 29. 



§ Lat. Ibid., 2S ; Nouv. Die. d'Hist. Nat., 2d edit., and Lin, Trans. XIV, p. 111. 

 For these various subgenera, see Memoire sur les Diplolt-paires, by M. Maximilian 

 Spinola, published in the Ann. du Mus. d'Hist Nat., as well as the excellent work of 

 M. Dalman, on the Insects of this tribe. 



II Lat. Gen. Crust, et Insect., IV, 39 ; Dalm., Annul. Entom. 7- 



