376 HYMENOPTERA OF AMERICA. [PART I. 



Hab. The hot parts of Mexico. 3 % . I caught the type in 

 Fueblo Yiejo, near Tampico ; the variety is from Orizaba. 



2. A. Brasiliensis Sadss. — A. Mexlcano affinissimus ; at clypeo et 

 thorace iinmaculatis ; abdominis segmentis 3°-5° tenuissiine flavo- 

 marginatis, lituris 4' et 5' interruptis ; tarsis ferrugineis. 



Alastor Brasiliensis Sadss. Et. Vespid. Ill, 329, 211, pi. xvi, fig. 1, % 

 (1S54). 



Hab. Brazil. 



Subgenus ALASTOR proprie diet. 

 (Sacss. Vespides, III, 328.) 



First abdominal segment without transverse suture. 



The American species form the 



Division HYPALASTOR. 

 (Sauss. Vespid. Ill, 328.) 



Form slender and cylindrical. Metalhorax superiorly pro- 

 duced behind the p)Ost-scutel, then truncate; its margins 

 sharp. (A group quite corresponding to Hypalastoroides.) 



3. A. aiiglllicollis Spin. — Niger; pronoti margine antico, macula 

 subalari, tegulis, fascia scutelli, margine postico abdominis seguientoruui 

 l 1 , 2', luteis ; antennis pedibusque ferrugineis, his basi nigris ; alis fer- 

 rugineis, apice griseis. — Long. 11 mm. 



9 . Clypeo nigro, antennarum scapo nigro, flagello superue conspurcato. 

 — % • Clypeo luteo; scapo rufo superne puncto obscuro. 

 Qdynerus cmgulicollis Spinol. in Gay's Hist. fis. de Chile, Zool., VI, 261, 



7 (1851). 

 Alastor anyuUcollis Sauss. Et. Vespid. I, 258, 14, pi. xxi, fig. 7, % . 



Hab. Chili. 



4. A. melaiiosoma Sauss. — Omninoater, gracilis, cylindricus; clypeo 

 9 grosse punctato, apice late subexciso,subbidentato ; capite et thorace 

 grosse punctatis ; thorace antice latiore, pronoto biangulato, in margine 

 antico et in lateribus marginato, metanoto valde rugoso, coarctato, valde 

 pone post-scutellum producto ; postice valde foveolato ; margine circu- 

 lari acutissimo superne fisso ; margine infero bidentato (seu quadri- 

 dentato) ; abdomiue antice acute truncato. 



Alastor melanosoma Sauss. Et. Vespid. I, 259, 15, pi. xxi, fig. 8, £ (1852). 



Total lengtb, 14 mm. ; wing, 10 mm. 



