No. 22.] HYMENOPTERA OF CONNECTICUT. 733 



M. (M.) bimaculata LePeletier. Howard, Insect Book, PI. 

 iii, Fig. 1 6. 



New Haven, 13 July, 1900; Westville, 22 July, 1906 (W. 

 E. B.). 



°M. (M.) obliqua Say. Howard, Insect Book, PI. iv, 

 Fig. 22, 



°M. (M.) agilis var. aurigeniae Cresson. 



Tetralonia Spinola. 

 Synhalonia Patten. 



T. atriventris Smith. Howard, Insect Book, PI. ii. Fig. 19. 



Female: with hair on the inner side of the basal joint of the 

 hind tarsi black or fuscous ; hair of thorax above nearly entirely 

 fulvous. • Male : clypeus and labrum light ; thorax above without 

 dark hair; flagel entirely dark, mandibles without a light spot; 

 abdomen not covered with fulvous hair, the apical part black with 

 dark hair ; upper lateral borders of clypeus black, the yellow npt 

 notched ; hind spurs not in the form of a hook. 



New Haven, 4-10 May, 1904 (H. L. V., W. E. B.) ; Westville, 

 20 May, 1905 (W. E. B.) ; Branford, 11 May, 1905 (H. W. W.). 



Cemolobus Robertson. 

 °C. ipomcese Robertson. 



Length 13-17 mm. Clypeus trilobate, with a transverse apical 

 whitish band in the male ; mandibles with a distinct angle on the 

 outer margin, this angle being spined in the male; hind metatar- 

 si in the male arcuate ; female with the second joint of the maxil- 

 lary palpi nearly as long as the third, fourth, and fifth combined ; 

 scopa nearly black. 



Visits flowers of the morning-glory {Ipomcea) ; hence its 

 specific name. 



Xenoglossa Smith. 



X. (Peponapis) pruinosa Say. PI. x, Fig. 6; Howard, 

 Insect Book, PI. iii. Fig. i, PI. vii, Fig. 2 (the latter errone- 

 ously labeled X. spriuna). 



Length 10-14 mm. Female with its mandibles bidentate at 

 apex; second and third joints of maxillary palpi subequal; second 

 to fourth dorsal abdominal segments with whitish pubescent fas- 



