{i86 MK. E. C. ItEED OK CHILIAN [NoV, 7, 



Odyneetjs AMBIGUTJS. 



5 . Odynervs amhiguus, Spin. 1. c. p. 264 (1851). 



c? . Ociynerus hvstillosii, Sauss. in Gay, vi. Supp. p. 567 (1852). 



This and the two following species belong to Wesmael's sub- 

 genus Ancistrocerus. 0. amhiguus is probably a common and 

 variable species, of which I have many specimens and varieties, but 

 no specimens that I have seen agree fully with the description. 



Odtkebus scabriuscultjs. 



Odifnerus scabriusculus, Spin. 1. c. p. 262 (1851). 



The original description of this species in Gay's work is so 

 thoroughly bad, like many other descriptions in that work, that in 

 the Latin diagnosis a male is described as the female, and the 

 Spanish part is full of absurd errors. 



De Saussure afterwards published a fair description from the 

 type that exists in the Paris Museum. 



This species is local, but not uncommon in Colchagua. 



Odtnbbfs vicnsTTS, sp. nov. 



Allied to 0. scahriusciihis, but larger, less coarsely punctured, and 

 with a yellow band on the scutellimi. 



5 . Slender, head and thorax strongly punctured, 1st and 2nd 

 segments of the abdomen finely punctured ; anterior margin of 

 prothorax recurved, angles rounded. Suture on 1st abdominal 

 segment well defined, angular in the middle. Black, shining, head 

 and thorax densely covered with short reddish hairs ; antennae 

 reddish beneath ; legs pitchy, tarsi and knees reddish. A small 

 spot behind the eyes, anterior margin of prothorax, tegulse, a spot 

 near root of wing, the posterior margin of the scutellum, posterior 

 margin of the first two abdominal segments, yellow. 



A small but distinct tubercle exists beneath the 1st abdominal 

 segment ; 2nd segment not tuberculated, but thickened anteriorly, 

 the elevation forming a ridge. The tooth on posterior margin of 

 the metathorax is very distinct, but hardly so large as in 0. sca- 

 briusculus. 



Length llmillim., wing 6 millim. 



One specimen caught near Valparaiso. 



Odyneeus excipiendus. 



Eumenes e.rcijnendus. Spin. 1. c. p. 2Q(5 (1851). 



Odynerus armatus, Sauss. Vesp. i. p. 160 (1852). 



This species, according to the original description by Spinola, has 

 the terminal joints of the male antennae red, as in my specimens. 

 But Saussm-e, in his 'American Wasps,' makes his 0. colocolo, with 

 terminal joints black and a tubercle on the upper side of the 2nd 

 abdominal segment, to be the true 0. ecccipiendus. 



I have never seen 0. colocolo, so cannot say whether it is a good 

 species or not, but my specimens of 0. excipiendus, Spiii., fully 

 agree with Spinola's description and with the description of 

 0. arciiatuj. 



