Ml. K. E. Turnci" o« Fcssoi-hil Ihjinenoi>tcra. D.'J 



(lilVi'rciitly loriiicd from the otlicrs, tlic inaiulihlcs less dis- 

 liiictly trideiitate, iiiul a spine ou the anterior i'emora of the 

 male ; the sccoiul joint ot' the fhigellum is also very long. 

 (/'. ordiiuirius, manifestatus^ buittalns, and neyledus form 

 another gronp nearly related to the last; whilst C. con- 

 (/luhittus and cinctus have the male antenntc normal antl no 

 carina on the elypeus. In the two latter speeies and in 

 hebetescvns the tooth on the inner side of the mandibles 

 near the base is well developed, whieh, so far as I can see, is 

 not the ease in the other speeies. 



Key tu the Australian Species of Crabro (Solenius). 

 9$. 



1. Clypens ■nitli a carina 2. 



Clypeiis without a carina 8. 



'2. Wn\\ ail oianj^e or yellow band, entire oi- 

 inteniii>ted, ou tLe base of tlie second 



dnitial sogiuent 3. 



Withuiit an orange or yellow band on the 

 second dorsal .•■eprment 7. 



3. Clypcus produced into a strong- porrect tooth 



at the apex, with a tooth on each side at 



the lateral angles 4. * 



Ciypeus not produced into a ijorrect tooth, 

 lateral angles without teetu o. 



4. Transverse baud of second dorsal segment 



orange, broad, aud entire; three apical 



segmeuts orange C. trUhntatm, Sm. 



Transverse baud of second dorsal segment 

 yellow, narrow, aud interrupted ; Itasal 

 half of fourth dorsal segment yellow; 

 two apical segments black C. tdsmcmicKS, Sm. 



5. Fourth dorsal segment with a transverse 



orange or yellow band at the base .... 6. 



Fourth dorsal segment entirely black C. munifcstutus, Turn. 



G. Band of the second segment orange aud 

 broad ; scutellum and postscutelluui en- 

 tirely black C. bivittatux, Turn. 



Baud of the second segment yellow and nar- 

 row ; scutellum with a yellow spot at 

 the basal angles, postscutelluui with a 

 transverse yellow baud C. ordiiuirius, Turn. 



7. Second dorsal segment entirely black C. mavkayensis, Turn. 



Five ba.«al dorsal segments with lateral 



white spots C. hebctvscens, Turn. 



8, Clypeus with a small semicircular trunca- 



tion at the slightly porrect apex; ante- 

 rior angles of prouotum pointed ; three 



apical dorsal segments orange C. cinctus, Turn, 



Clypeus without an apical truncation, not 

 porrect; anterior angles of prouotum 

 obtuse ; three apical dorsal segments 

 black C. cotigtobatus, Turn. 



