74 [April, 



2 (1) Mesonotum never sculptured as above, either remotely or at least 



irregularly and unevenly punctured, or if closely, the surface 

 between the punctures is dull ; 2nd and 3rd abdominal segments, 

 when punctured, with the punctures very feebly impressed, the 

 surface rarely at all shining between them, but generally rugulose ; 

 in many forms impunctate, the apical impressions without con- 

 spicuous scattered punctures on a rugulose surface. 



3 (6) Apical impression of the 3rd segment very strong across the whole 



width of the segment, that of the 2nd segment quite distinct and 

 often rather strong (2nd segment nearly always punctured, the 

 stigma pale) . 



4 (5) Abdomen with a thin transverse fringe of white hairs springing from 



the base of the apical impression of the 4th segment; this impression 

 on the 3rd segment polished, the sculpture very feeble or wanting in 

 the middle ; very feeble and sometimes wanting on the 2nd segment 



also saunder sella, n.n. V 



= nana, E. Saund. 



5 (4) Abdomen with a dense transverse fascia of white hairs on the 4th 



segment apically, a dense interrupted one also on the 3rd, and one 

 still more widely broken on the 2nd ; apical impressions on the 2nd 

 and 3rd segments with extremely dense sculpture, appearing as a very 



dense puncturation. (Stigma always very pale) spreta, Perez. 



( = niveata, E. Saund. nee Friese). 



6 (3) Apical impression of the 3rd segment feeble, at least on the middle 



part of the segment, that on the 1st generally not at all or barely 

 distinguished except by a change in the sculpture. 



(2nd segment in many forms impunctate, stigma in some not 

 pale yellowish in the middle). 



7 (10) 2nd and 3rd abdominal segments with evident, and more or less 



numerous, punctures amidst the rugulosity of the surface. 



8 (9) 4th abdominal segment with a transverse apical fringe of conspicuous 



pure white hairs ; mesonotal puncturation stronger and closer ; 

 apical appressed hairs of the 5th dorsal segment largely whitish or 

 tinged with white, from some of the upper hairs being of this 

 colour, always very pale. 



(Mesonotum closely or fairly closely and evenly punctured, the 

 punctures of moderate size or rather large ; scutellum in front with 

 deepish distinct, and plentiful punctures, the surface between them 

 shining or polished, at least in some aspects) ... alfkenella, sp. n. 



9 (8) 4th abdominal segment with a fringe of less conspicuous yellowish 



or pale golden hairs ; mesonotal puncturation fine, either remote, 

 or irregular ; apical appressed hairs of the 5th dorsal segment 

 brownish-golden or sometimes subfuscous in the middle. 



* This joint is a good deal shorter in some examples than in others, but the long, more or 

 less depressed, snowwhite clypeal hairs are very distinctive. 



