•u 



MEMOIRS OF THE QUEENSLAND MUSEUM. 



The fdllowlng ki\\' will bo convenient for the sepuratiou of the above sjjecies 

 I inehicle also two other forms, (lesciibed below. 



AI>doinen with some red 

 Aljdomen without red 



1. The red a band on apex of tiret segment and ba.se of second . 

 The red including more than a segment . . 



2. Abdomen at least partly brilliant lilue 

 Abdomen black 



3. Thorax and face black 

 Thorax blue 



4. Male ; tubercles light yellow, not continuous with yellow oi ])!-othorax . . ]-*. distuncta. 

 Female; tuljercles bright chrome, continuous \\ith yellow margin of 2_irothorax, which however 



is very broadly- interrupted in middle . . . . . . . . . . P. chromatica. 



5. ilarginal cell deep fuscous . . . . . . . . . . . . . . . . P. serotinella ?. 



Marginal cell not thus fuscous . . . . . . . . . . . . . . . . . . 6. 



6. Scutellum and postscutellum bright chionic yellow .. .. P. nubiloseUa mcdiosticla. 



1. 



2. 



Eiiri/ylosaa liypoleuca. 

 Prosopis constricta. 



3. 



5. 



P. cyanroniicans lugrcscens. 

 4. 



Scutellum and postscutellum black 



7. Axillse yellow 

 Axillae black 



8. Cljqieus black ; lateral marks cream colour ; very small 

 Clypeus not black 



9. .\ black stripe Ijetween clyix»us and lateral marks ; larger species 

 No such black stripes ; smaller species 



10. Tuljercles white 

 Tubercles yellow 



11. Yellow of prothorax interrupted in middle 

 Yellow of prothorax not interrupted 



12. Face narrow ; legs nearly all yellow 

 Face broad ; legs witli less yellow 



Pala-orhiza }n€lliceps, 



8. 



Prosopis ciiijeniella. 



y. 



P. aurifera. 



10. 



P. ebuniiella. 



11. 



. . P. amictdijormia. 



12. 



P. amicnla, 

 P. serotinella (J. 



Prosopis bidentata Smith. 



This species was described by F. Smith in 18.53 (Cat. Hyni. B.M., Pt. i, p. 28) 

 from a male in the J. S. Baly collection, the locality being given as "New Holland." 

 It is not represented in the British Museum, and I do not know the present location 

 of the type. Mr. Hacker has collected on Stradhrolce Island, September 17th, 1!U5, 

 a male which he considered to belong to P. aurifera Ckll. It is, however, too large 

 for aurifera, and is, I am sure, a distinct species. The front is not distinctly 

 punctate as in aurifera. tlie mesothorax is duller, and the legtilse are mainly reddish. 

 It is, I am sine, the long-lost P. hidnUata. with the description of which it agrees 

 very well. The first recurrent nciviirc joins the second submarginal cell near its 

 base, as it should not do in hidenlala ; but this discrepancy may be due to variation, 

 or even to an error in the original account. The species is a very striking one ; the 

 long ventral al)doiMinal teeth or spines are at the end of a long convex ridge, and 

 both ridge and teeth are j)olished and shining. The mandibles do not accord with 

 those of Gnalhoprowpifi ; the orange face is dull, not oily and polished, and the scape 

 is not dilated. Jii otli<>i- rcs|)('cts, however, the species seems close to Gnathajtrosopis , 

 and it is jierhaps doubtful whether that genus should be maintained. 



