530 Mr. G. A. K. Marshall on 



D. Group with Darh Bodies, Central White Patch and 



Red- Broitn Tails: Megachile the i/of^e/s (Represented 

 on Plate XXI). 



IIymexoptera. Diptera. 



Megachile chrysorrhrjea (tig. 29). Lapliria nr. flavipes (fig. 31). 



,, nasalis (tig. 28). 

 Coelioxys pu.silla (tig. 30). 



The Megachile bees mentioned above are both common, 

 not only visiting flowers, but also, during- the drier months, 

 occurring in some numbers on damp sand or mud near 

 water. The parasitic Cmlioxijs may be seen with them in 

 both stations, but is a much scarcer insect. The Asilid is 

 also an uncommon species, having the usual habits of its 

 congeners and settling about on low plants. 



E. Group with Black Thorax and Yellow Ahdonicu : 



all Hymcnoptcra (Represented on Plate XXIII). 



Tenthredinida: Atlialia bicolor (fig. 11). 



Ghalcididx Chalcis bicolor (tig. 10). 



Scoliadm Elis aureola (tig. 1). 



Crabronida^ | P'lil'i^thus fnscipcnnis (tig. 2) ; P. diadema (tigs. 3, 4) ; 



\ r. buceiilialus (tig. 5). 



Eumenidce Rliynchium radiale (tig. 6) ; R. rubens (figs. 7, 8). 



Andrenides Sphecodes rufiventris (fig. 9). 



This is a beautifully compact and uniform little group, 

 and is specially interesting owing to its comprising species 

 of no less than six families of Hymenoptera, which exhibit 

 great differences in tbeir food and general habits — especi- 

 ally in their earlier stages. Yet the imagines may be 

 frequently observed all flying together about the same 

 patch of flowers, and the uniformity of their coloration is 

 then very striking. All the species are common and 

 efficiently protected, so that the association is probably 

 Mullerian. 



F. Group ninth Black Bodies, Blue IFiiigs, and Yellow 



or Bed Thorcw (Represented on Plate XXIII). 



Xylocopa lateritia (fig. 12) ; X. flavo- 



nifa (fig. 13). 

 Xylocopa olivacea (fig. 16) ; X. modesta 



(fig. 17). 

 Podalirius aeraeusis (tig. 14) ; Autho- 

 plioi'a ? basalis (fig. 15). 

 ScoUadie ^ YA'is cadebs (fig. 18). 



Lepidopteua Scsiadx Melittia sp. (tig. 19). 



Hymexoptera 



Apldte 



