some British Guiana Hymenoptera. 321 



Family ICHNEUMONIDAE, Leach. 



Subfamily OPHIONINAE. 



Genus Eiphosoma, Cressoii. 



E. azlecum, Cress.? Issororo, N.W.D. 



E. texanum. Cam. Botanic Gardens, Georgetowii. 



Genus HENicosriLUS, Stephens. 



H. major, Morley. Attracted to artificial light. Rock- 

 stone, Essequebo River. 



H. nigricornis, Brulle. Attracted to artificial light. 

 Rockstone, Essequebo River. 



H. flavoscutellaius, Brulle. Attracted to ai'tificial light. 

 Rockstone, Esse({uebo River. 



H. maculiceps, Cam. Bred from the pupa-case of a 

 Noctuid moth, Amyna ocio, Guen. An uncommon species 

 on the coast lands. 



Genus Itoplectis. 

 I. pJalana, Morley. 



Subfamily ICHEUMONINAE. 

 Genus Joppa, F. 



J. antennator, F. Rockstone, Essequebo River. 

 J . geminafa, Vriich. Courantyne (Joast, Berbice. 



Explanation of Plates XXI-XXIII. 



PLATE XXI. 



Fig. 1. Sijnoeca sitriiianui, L. 



2. Sceli'phronfidulare, Dalilb. 



3. XylocojKiJirnbriala, F. $. 



4. „ „ F. ^. 



5. Mud nest of Melipona guianue, Ckll. 



6. Mud nest of Trypoxijlon brevicarinatum, C'am. 



7. Euinenes canaliculafa, Oliv., on its mud cell. 



Figs. 1, 2, 3, 4, 5 and 7 are about the natural size. Fig. (5 is 

 considerably reduced. 



PLATE XXIL 



Borings of Xylocopa fimbriata, F.,in softwood. Note the "wad " 

 of sawdust which divides the cells. Considerably reduced. 



PLATE XXIII. 



Mud nest of Sceliphron fistulare, Dahlb. Slightly smaller than 

 natural size. 



