156 



Edeagus, seventh and eighth sternites closely resembling those of 

 Hylacus episcopalis (Cockerell) as figured by Metz and in material which 

 I have determined as that species from my own collection, differing prin- 

 cipally from that species by the feebler development of the apical lobe 

 of the seventh sternite. The figure of the edeagus of H. episcopalis does 

 not give a good impression of its structure, if my determination is cor- 

 rect. In both that species and H. monticola the sagittae are abruptly 

 divergent a little beyond the base and then convergent and each sagitta 

 bears a small lobe at the divergence, its apical limit marked by a notch. 



Scape little expanded, arched; second tergite contracted at apex, 

 third more feebly. 



9 Length 7 nmi. ; wing 5 mm. : $ Length 6.5 mm., wing 7 mm. 



Described from two $ and four $ specimens collected 

 at Ohinzenji (4000-5000 ft.) July- August, 1913. 



Type, allotype and paratypes in the author's collection. 



Hylaeus sp. 



(5 Similar, supraclypeal area broader, yellow only along the margins, 

 scape and tubercles black, front basitarsi pale, band on hind tibiae 

 shorter. Edeagus, seventh and eighth sternites much as in the preceding 

 but the apical lobe of seventh sternite more developed and the stem 

 of the process of eighth sternite a little more contracted before the apex 

 Length 5.5 mm. ; wing 4.5 mm. 



This male I could not associate with any of the females 

 with any certainty and, since the single specimen (Xikko 

 August, 1913,) did not make the coloration-characters sure, it 

 seemed better to leave it unnamed rather than establish a name 

 in this difficult section of the genus. 



There are doubtless many other species of the genus in 

 Japan remaining to be studied. 



22. ISToETH Americax Hylaeus. 



3Ietz in his excellent paper on the iSTorth American Pro- 

 soph (Tr. Am. Ent. Soc. 37:85-146, 1911) has laid a good 

 foundation for the study of the North American species. He 

 has not, however, had sufficient grasp of the geography of 

 Xorth American entomology and on that account and on ac- 

 count of his attributing too great variability to the species in 



