130 WILLIAM J. FOX. 



of Hynieii()j)terous Insects in the collection of the British Museum, 

 Pt. Ill, synonyniizes completely the genera and subgenera made by 

 the above mentioned authors, adding thereto the genus Entomogna- 

 thuH Dahlb. JNIorawitz, Einige Bemerkungen iiber die Crabro-artigen 

 Hynienopteren, divides the species into two groups and seventeen 

 subgroups, which he states will probably have to be reduced to nine. 

 This author uses the names proposed by St. Fargeau and others to 

 distinguish the groups and names several for the first time. 



Following closely on Morawitz's work Packard's monograph of 

 the Crabroninse appeared. This author, evidently influenced by 

 Shuckard's and Smith's work, throws the greater num1:)er of the pro- 

 posed genera, subgenera, etc., together under Crabro, but recognizes 

 Tln/reopiis, Blepharlpm and Khopahnn, and describes his Anacrabro. 



Thomson, Hymenoptera Skandinavia, III, recognizes Rhopahim, 

 EntovKH/nafhns and Lmdenim as genera, and under Crabro has 

 twelve subgenera, named as in Morawitz's work. Kohl, Raubwespen 

 Tirols lists eleven subgenera and one species of doubtful position, 

 (/ameron, Biologia Centrali-Americana comes out on the lines laid 

 down by Shuckard and Smith, and discards entirely the genera, 

 subgenera and groups proposed by preceding writers. 



It will be seen from the foregoing review, for which the author is 

 partly indebted to Kohl's, Die Crabronen der Section Thyreopus Lep., 

 that hymenopterists had accepted no classification of these wasps as 

 a standard, but were on the contrary almost to a unit dissatisfied 

 with the work of their colleagues, and therefore endeavored to form 

 a system which each thought the most luitural. It is not surprising 

 that St. Fargeau and BruUe consideretl Crabro worthy of more than 

 one generic name, when the few species then described are taken into 

 consideration, nor is it remarkal)le that witli the constantly increasing 

 number of known species, each classification difiered ; so it is to-day 

 that I feel compelled to accept the. system of Shuckard and Smith 

 almost in toto and discard the many names erected for subgenera, 

 groups, or whatever they have been considered, and unite under one 

 head, Crabro. 1 take exception, however, to regarding either En- 

 tonwgiiatJnix or Anacrabro as synonyms with Crabfo, as they possess 

 characteristics, always constant, and not fi)und elsewhere. 



From the Oxybelinne, the Crabronime difier— 1, by the very broad 

 eyes, usually narrowed at the top ; 2, the metanotum without squanue, 

 and the middle segment not armed basally with a spine ; 8, the neu- 

 ration of the fore-winijs, which contain a distinct submarginal cell. 



