HENRY J. FRANKLIN. 185 



Moscou, LIX, 1884, pp. 59-61) is correct, also belong cer- 

 tainly to this group, though I have no evidence to show that 

 this is so, aside from Radoszkowski's opinion. There are 

 probably still other species in the Old World, with the char- 

 acters of which I am not familiar, which belong to this 

 group. I have examined the male genitalia of lapidarius 

 (taken from a specimen determined by Schmiedeknecht) 

 and find that, in many respects, they resemble closely those 

 of the species of the Pratorum group. Each squama, how- 

 ever, has a distinct, though not very well developed, inner 

 lobe, and the head of each sagitta extends mesad in a long 

 spine-like projection, but is not falcate. I am inclined to con- 

 sider this structure of the genitalia as representing, in a large 

 measure, the very primitive structure of the genitalia of the 

 Pratorum group. It should be noticed that Radoszkowski 

 (Bull. Soc. Natural. Moscou, LIX, 1884, p. 62) made lapi- 

 darius the typical species of a group in which he also placed 

 caucasiais Rad. and eriophor^is Klug. 



3. KiRBYELLUS GROUP. 



a/pinus (L.) . 

 hyperboreiis Schonherr. 

 balteatus (= nivalis) Dahlbora. 



These three species have been placed in this group by 

 means of Schmiedeknecht's descriptions (Apid. Europ., I, 

 P. 5, 1883) of them, particularly by his descriptions of their 

 male genitalia. 



4. BoREALis Group. 



distinguendus Morawitz. 

 ? /ra^raw^ (Pallas). 

 latreillellus (Kirby). 



I have seen specimens of both distinguendus and latreillellus 

 labelled by Schmiedeknecht and have examined the male 

 genitalia of the latter species. The figures of the genitalia 

 of both these species, given by Radoszkowski (Bull. Soc. 

 Natural. Moscou, LIX, 1884) and Schmiedeknecht (Apid. 

 Europ., I, P. 4, 1882), agree very well and indicate that 

 they are much like the genitalia of borealis and appositus. 

 The figure of the male genitalia of fragrans, given by Sch- 



TRANS. AM. ENT. SOC, XXXIX. (24) 



