SOUTHERN CALIFORNIA ACADEMY OF SCIENCES. 73 



Anthidium collectum, Huard : 

 Four males obtained by Dr. Davidson are referred here ; two 

 from Los Angeles, one from Tehachapi, one from Swit- 

 zer's. According to the original description, collectum 

 Huard (compactum, Provanclier) differs from tricuspidum 

 in being smaller, having no marks on thorax, and the first 

 three segments of abdomen with the bands divirl<-J into 

 spots. The last character is somewhat variauiv,. ^xiC 

 species appears to be very near to A. emarginatum, Say, 

 but that has the abdominal bands yellowish-white or white. 

 The specimen from Tehachapi represents a distinct variety, 

 perhaps species, which may be described thus : 



A. collectum var. ultrapictum, no v. 

 -A little larger; scape with a yellow stripe; abdominal bands 

 very bright yell(!)W, only that on first segment divided into 

 four spots, the others not even divided in the middle, 

 though emarginate there and squarely notched laterally; 

 sixth segment with two very large round yellow marks, 

 touching in the middle line; seventh all black, with the lat- 

 eral lobes not so produced as in collectum, and distinctly 

 angled on the outer side ; tibiae with more yellow. The 

 dorsal pubescence has just a faint ochreous tint. There 

 are no sub-apical ventral spines. 



Anthidium (emarginatum, Say var?) Titusi, nov. 



Easily distinguished from typical emarginatum (male) by the 

 bright lemon-yellow (instead of yelloAvish- white or white) 

 abominal bands, and the tibiae all black except a minute 

 basal spot, and an apical one on middle tibia. Clypeus with 

 two black dots near upper border ; antennae entirely black ; 

 dorsal pubescence dull white; thorax all black except two 

 short lines on scutellum ; anterior part of tegulae yellow ; 

 wings dusky; basal joint of tarsi light yellow, the other 

 joint ferruginous: first abdominal segment with very long 

 hair, its band divided into four spots, the middle ones trans- 

 versely elongated ; bands on the second and third greatly 

 narrowed mesad of the notch, and slightly divided in the 

 middle ; on fourth and fifth widely notched, but only emar- 

 ginate in the middle : sixth segment with two very large 

 comma-shaped yellow marks: seventh all black, formed 

 about as in ultrapictum, but the lateral lobes not quite so 

 produced ; venter black ; apex of venter strongly tridentate, 

 with a large median ferruginous process directed caudad, 

 and large black lateral spines directed more downwards. 



.Hab.— Fort Collins, Colorado, June 13, 1900. (E. S. G. Titus.) 

 The apical ventral, structures recall A. montivagum. 



