J 



70 HYMENOPTEKA. 



BOTHYNOSTETHUS. 



Bothynostethus, Kohl, Verh. zool.-bot. Ges. Wien, xxxiii. p. 344 (1884), & xxxiv. p. 449 ; Handlirsch, 

 Sitz. der k. Akad. der Wissensch. Wien, xcvi. p. 221. 



A distinct genus not closely related to any other yet described. Two species are 

 known. 



1. Bothynostethus saussurei. 



Bothynostethus saussurei, Kohl, Verh. zool.-bot. Ges. Wien, xxxiii. p. 346, t. 18. figg. 5,6' ; Hand!. 

 Sitz. der k. Akad. der Wissensch. Wien, xcvi. p. 224, t. 1. figg. 1, 2. 



Hab. Mexico, Huastec 1 . 



ALYSON. 



Alyson, Jurine, Nouv. methode de class, les Hymen, p. 195 (1807); Handlirsch, Sitz. der k. Akad. 

 der Wissensch. Wien, xcvi. p. 235. 



A well-known genus of small extent, but of wide range. 

 / 



v l. Alyson mellens. 



Alyson melleus, Say, Bost. Journ. Nat. Hist. i. p. 380 \; Complete Writings, ii. p. 762; Packard, 

 Proc. Ent. Soc. Phil. vi. p. 422 2 ; Handl. Sitz. der k. Akad. der Wissensch. Wien, xcvi. 

 p. 253 3 ; Cresson, Trans. Am. Ent. Soc. 1887, Suppl. p. 280. 



Hab. North America 123 , New Jersey, Indiana, Illinois, Virginia, Texas.— North- 

 west Mexico 3 . 



NYSSON. 



Nysson, Latreille, Hist. Nat. des Crust, et des Ins. iii. p. 340 (1802) ; Handlirsch, Sitz. der k. 



Akad. der Wissensch. Wien, xcv. p. 281 (1887). 

 Paranysson, Guerin, in Cuvier's Icon. Regn. Anim. p. 441 ; Cresson, Trans. Am. Ent. Soc. ix. 



p. 273. 

 Acanthostethus, Smith, Trans. Ent. Soc. Lond. 1869, p. 306. 

 Hyponysson, Cresson, Trans. Am. Ent. Soc. ix. p. 273. 



This genus is cosmopolitan, and found in all parts of the world. Nearly seventy species 

 are known, of these twenty-one are from North America or Mexico, and eight from 

 South America. 



i. Posterior tibiae serrate; lateral margin of the scutellum strongly reflexed ; post- 

 scutellum bilobed; apex of the abdomen generally with four teeth. (Paranysson.) 



1. Nysson mexicanus. 



Nysson (Paranysson) mexicanus, Cresson, Trans. Am. Ent. Soc. ix. p. 275 \ 

 Nysson mexicanus, Handl. Sitz. der k. Akad. der Wissensch. Wien, xcv. p. 303. 



Eab. Mexico (Sumichrast 1 ). 



$v 



