162 



labial palpi 4-jointed rather stout and short about as long as the tongue^ 

 the basal joint longest, apical joints subequal. Apical portion of maxilla 

 ovate, expanded, sinuate or subemarginate within and without near the 

 apex hyaline within, labrum transverse, ciliate anteriorly with a short 

 weak median process basally elevated into a ridge, notched medially. 

 Upper inner margin with a narrow fovea. 



2 Antennae with pedicel and flagellar joints i & 2 subequal, following 

 joints subequal, a little broader than long to a little longer than broad. 

 Tergites 2 and 3 with a narrow transverse submedian impressed line. 

 Pygidial area strongly narrowed near the base, narrow and truncate at 

 apex, longitudinally, subcarinate medially. 



$ This sex has not previously been described. It is very much like 

 the 5 . The abdomen a little smaller and narrower. Face clothed with 

 coarse silvery hairs as in Spliccodes, mandibles with a single subapical 

 tooth within (the 9 has two), antennae about as long as the head and 

 thorax, scape short and stout, a little longer than the 3d flagellar joint, 

 with silvery plumose hairs outwardly; pedicel and ist flagellar joints 

 broader than long together about as long as the 2nd flagellar joint, this 

 shorter than third, this and following joints subequal about twice as 

 broad as long, the flagellum more or less nodulose and Sphec odes-like. 



Tergite 4 has a sub-basal narrow impressed line while 2 and 3 are 

 as in the $ . 



Seventh and eighth sternites concealed and highly modified, the sev- 

 enth with divergent basal struts, apically membraneous and cleft into 2 

 quadrate lamellae ; 8th basally lamelliform apically produced into a dark 

 narrow parallel-sided, strapshaped spine, very slightly expanded apically 

 and rounded. 



Cardo well developed about as broad as long, basal portion of stipes 

 short, the median apical angles a little acute, apices nearly straight, the 

 apical half outwardly with rather setose whitish hairs. Sagittae together 

 ovate lanceolate excavated or broadly channeled above, inner margins 

 adjacent in the basal half and then separated in a gentle curve and 

 approximate apically. 



The affinities of this genus are clearlv with Paracolletes and 

 they together diverge from Colletes by the presence of the 

 pygidial area. Here too belong several of the genera of bees 

 with emarginate tongues and 2 euV)ital cells rather than with 

 Hylaeus. 



DUFOUREIDAE. 



23, MiMULAPis n. gen. 



Related to Halictoides but with greatly elongated mouth parts and 

 a well developed malar space. Maxilla with the cardo nearly as long 

 as the stipes, lacinia acuminate about two-thirds as long as the stipes, 

 palpi about as long as the stipes, 6-jointed, basal and 2nd joint larger 

 than the remainder, basal about half as long as the second, second a 



