422 MB. E. SAUNDERS ON THE TONGUES OE THE 



base ensheatliiiig the base of the lingua ; their lateral poi^- 

 tions produced into two elongate subfiliform processes, slightly 

 widened and truncate at the apex. Lingua very long and rather 

 thick, clothed with very long hairs. Mentum elongate, trilobate 

 at the apex; labial palpi with the first 3 joints sheath-like, the 

 1st and 2nd subequal in length, 3rd very sliort, 4th divergent, 

 cylindrical, about half as long as the 3rd. I have only dried 

 specimens to work from, but the subuientum is not recognizable, 

 and the lora are apparently absent ; in fact all the sclerites in 

 this portion of the mechanism appear to be on the same plan as in 

 Sphecodes and Halictus : through the dried membrane that lies 

 between the cardines two elongate sclerites can be clearly dis- 

 cerned ; these, I have little doubt, are analogous to the straps 

 observed in the genera above mentioned ; the cardines also are 

 very long and thin, as in those genera. These points of re- 

 semblance in structure to Halictus are most interesting, as the 

 facies of the insects themselves is so completely Halictiform. 

 The shape of the labial palpi, on the other hand, is similar to 

 those of the higher Apidse, but the paraglossae are unlike those 

 of any other genus that I know. 



NoMADA, :E'abr. Syst. Ent. p. 888. (PI. VI. figs. 1-3.) 



Labrum transverse, anterior margin rounded, slightly produced 

 in the centre. Epipharynx very long, its sides slightly sinuate, 

 its apex bluntly pointed. At the base of the maxillc© are two 

 suboval chitinized spots, which appear to represent the basal 

 scales. Maxillfe dark outwardly, semilucent towards their inner 

 margins ; palpi very long, 6-jointed ; blades pointed and fringed 

 with hairs at the apex, inner margin broadly membranous. Para- 

 glossae wide, elongate oval at the base, slightly sinuate on their 

 external margins, apex produced into an elongate spine-like pro- 

 cess. Lingua elongate, nearly linear, nearly ten times as long as 

 wide, finely ridged and whorled with bristles ; apex with a spoon- 

 shaped lobe, although this lobe seems to be retracted (at least in 

 the specimen which I have examined) amongst the apical hairs. 

 Beneath, with the mentum about four times as long as wide ; 

 labial palpi 4-jointed, the joints narrow and rounded, 1st joint 

 longer than the other 3 together ; submentum very long. Maxillae 

 with a few long plumose hairs at the base ; lora well developed, 

 but short ; cardines very long. 



