126 CHARLES ROBERTSON. 



Ceratiiia tejoncn$«is Cr., Proc. Eiit. Soc. Phil, ii, 390. % . 



This was describetl from a California specimen, but in Cresson's 

 Catalogue it is credited to Nevada, and it was found by Provancher 

 in Canada. It is common in Illinois. I have thirty-five specimens ; 

 it is quite as common as males of C. dnpla, and I have taken it from 

 March 21 to September 23. I find no difference from males of C. 

 dnpla, except in structure of hind femora, and this does not present 

 any intermediate forms. The trouble is that I do not find any female 

 for it, and I suspect that it is a dimorphic male of C duplu, or that 

 its female cannot be distinguished from that species. I think it will 

 'be found wherever C. dnpla occurs. 



Syiiltalonia frater Cr. ; Melhsodea f rater Cr., Proc. Acad. Nat. Sci. Phil. 

 1878, 195, % ; Synhalonin frater Patton, Bull. U. S. Geol. Surv. v, 474 ; Me- 

 lisaodes speciosa Cr., Proc. Acad. Nat. Sci. Phil. 1878, 198, 9 ! Melissodes 

 (Uleda Cr. ibid. 199, % . 



This is a common species in Illinois. I have often taken the sexes 

 in copula. I have seen the types of S. frater in the collection of the 

 American Entomological Society. They are worn and faded speci- 

 mens. 



Syuhaloiiia belTragei Cr. ; Melissodes helfragei Cr.. Trans. Am. Ent. Soc. iv, 

 278, 9 '• MeUssodes honesta Cr., ibid. 279, % ; Synhalonia honesta Patton, Bull. 

 U. S. Geol. Surv. v, 474, % . 



This is also common in Illinois. I have taken the sexes in copula. 



Synlialoilia atriveutris Sm.; MeUssodes atriventris Sm., Brit. Mus. Cat. 

 Hyin. ii, 310, 1854, % ; Fiynhalonia atriventris Cr., Cat. Hym. N. A., 305, % ; 

 MeUssodes duUtata Cr., Proc. Acad. Nat. Sci. Phil. 1878, 194, 9 . 



^iynhalouia uigripes Sm. ; MeUssodes niqripes Sm., Brit. Mus. Cat. Hym. 

 ii, 311, 1854, 9 . 



]Mlelis!>iO<le!<i illiiioeiiMis 9-— Black; clypeus finely roughened, closely 

 punctured with iiither coarse, shallow punctures, except a median elevated line, 

 apex ferruginous ; labrum yellow, with dense pale pubescence ; mandibles honey- 

 yellow in the middle, with a yellow streak at apex ; antennae black, tip of scape 

 and second joint ferruginous, third joint black, a little longer than next two 

 together; remaining joints ferruginous, darker above; vertex shining, naked 

 and feebly punctured; sides of face and cheeks beneath with white pubescence, 

 occiput above with ochraceous pubescence ; mesonotum and scutellum closely 

 punctured, hardly shining, pubescence rather short and ochraceous, except on 

 the disc and edge of scutellum, where it is fuscous. Wings hyaline, nervures and 

 tegulse testaceous; submarginal cells of about equal length, third narrowed one- 



