Ueconh of Bees. .'5(5.5 



bands, but tbat on 2 distiiictly thon;,'li not very p;rcatly 

 widrr ; apical bail* not ivchliMifd, In Rolicitsons tabic; it 

 runs exactly to M. ilUnoensis, Rob., but it diiTcrs from tbat 

 in bavinjj; tbe closely-punctured clypeus witbout a distinct 

 median elevated line, tbe labrnni not yellow, tbe ncrvurcs 

 dark, rul'o-t'uscous, tbe secoiul s.ni. mucb sborter tban tbe 

 first or tbird, apical margin ot" first abd. seg. only very 

 narrowly testaceous. M. petulca bus tbe labruni dull 

 orange, and tbe submarginal cells more nearly equal, so 

 tbat it is nearer to illinoeiisis. Someone bad lal)elled tbe type 

 of M. petulcifonnis, M. intennet/ia, but it cannot at all be 

 reconciled witb tbe deserijjtion of tbat species. 



Hub. Fedor, Texas [Birkinann). 



A second specimen, not so large as tbe type, was taken at 

 Fedor, June 20, 18'.)8. 



Ale lis socles Helena', sp. n. 



M(i;.^iS'Hles hiimilior, vnr. a. Ckll. Ann. & Magr. Nat. Hist., Oct. I(t0.3, 

 }>. 447 (Las Ciiiccs, New Mexico, Aug. l!J, 6". II. T. Tuicnsend). 



Tbe females of tbe M. humilior group are small compact 

 insects witb black bair on middle of dorsum of tborax. 

 M. Heleme runs in my tables to M. trifasciata, Cress., but it 

 is not closely allied to it. In tbe following table tbe new 

 species is defined and separated from its allies : — 



Abdominal segment 4 with a con>:piciious 

 median triangular black patch, which has 

 black liairs at its sides; segment 2 wilii 

 H narrow, entire, conspicuous, median 

 white hair-baud, the distance b-'tween it 

 and the basal band in the median line being 

 less than the distance between it and the 

 hind margin ; third segment with its hind 

 margin very broadly black and bare ; fourth 

 segment with a large black basal area, 

 covered with short black hair, and ob- 

 tusely emarginate in the middh? po.stt'- 

 riorly ; hair ot' anterior part of thorax 

 light fidvous, of vertex with much black 

 (especially behind the ocelli), of face 

 white ; small joints of middle and hind 



tarsi clear nd .,1/. IUU-ykp, Ckll. 



Segment 4 not so marked ; segment 2 with- 

 out such a median band, the Sfcond band 

 being either broader or covering the 



vvliule hind margin 1. 



1. Hind marg-ins of segments 2 and y broadly 



bare, at least in middle '1. 



Hind margins of sc-'ments 2 and •) coverfd 



