38 bulletin: museum of comparative zoology. 



It thus appears that so far as the venation shows, the Florissant species are 

 nearest to some of those flying in Colorado at the present day. In the follow- 

 ing descriptions, those characters are italicized which may especially be relied 

 upon for the separation of the fossil species. 



Anthidium scudderi, sp. nov. 



Eobust probably about 15 mm. long (the end of the abdomen is lacking) ; 

 wid^of ko'rax abo'ut 5 mm. (probably increased by flattening) of head abou 4 

 general appearance normal; head and thorax black, wuh famtly -^-^ted bght 

 markings -apparently the clypeus was light, and a large patch on vertex and a 

 Tai f lo;giLdinal subdorsal stripes on anterior part of ^^--^ --'^^'-^^^^)' ^.^ 

 tl^ e markings, vaguely indicated by reddish color, may not truly repre ent the 

 termentary cdors : mandibles apparently short and heavy ; antennae and legs not 

 I le ; abJomen broad, very pale reddish, u-itk tke kind mar,.ns oftkese,.enis 



rnfuscated, tl.e darkening strongest on the actual --8-'. ^'^^J^^^'^;^^ ^^/:„tent 

 anteriorly the dark band occupying about a third of the visible par tof the segment 

 (nmch les on the first) ; on the second to fourth segments are rather poorly mdi- 

 ^ed dark marks in the subbasal region in the middle line and on each extreme 

 lateral margin, apparently indicatmg a subbasal band very broadly -terrupted in 

 te subdorsal ;eg?on ; it fs perhaps probable that the abdomen was in h^ yelW 

 marked with ferruginous ; the apparent pattern is not qmte like that of any 

 7lt species before me, but it is not difficult to see how it -'^^^ ^-°- -^^f;^ 

 into some of the patterns seen in modern Kocky Mountam species. Quite a close 

 gene 1 resemblance is shown by the abdominal pattern of A tern^^^ but m 

 that species the lateral subbasal dark spots are much nearer the ™^^^ ^ Ime. 



Anterior wings about 8 mm. long ; rvings strongly ^nfuscated, except in the basal 

 regfon conspicuously hairy. Venation in general .uite normal ; '"-^'^^ ""^^^^^ 

 its width about 720 m; b. n. going only just basad of t. n. ; first r. n. joming 

 second m. a long dfstance (quite 420 m) from base ; discoidal nervure oblique 

 Tnd curved, so that tke second discoidal cell is conspicuously longer on lo.er than on 

 :;perre the upper outer corner being very obtusely rounded. Hind wmg with 

 t. m. long and very obUque. 



Type.-l^o. 2002, Mus. Comp. Zobl. Florissant, Col. (No. 11,381, S. H. 

 Scudder Coll.). Dedicated to Mr. Scudder. 



Anthidium exhumatum, sp. nov. 

 cf Robust- length 13* mm. ; width of head a little over 4, of thorax about 5, of 

 abdomen ab'outl^ mm., the^e measurements (particularly the last) no doubt 

 ncrerd by crushing; head and thorax black without -y apparent markings ; 



mesothorax coarsely roughened; ocelli '^^^^'^''^^^^'.'''''Z^'^^^^^^^^^ 

 tween middle and lateral ocelli a little less than the diameter of °"^ '/^^^"J 

 wih broad pale reddish bands, tke kind margins of tke seg^nents not :^«;;^^";^' ^ "^^ 

 spots .-s/We; apex broadly rounded, no processes or teeth ^^-^ --b'., ^^^^^^^^^^^ 

 quadrate area is occupied by the genitalia, the exact f "^.^^^J, "^^ ^^'^^^l^r 

 made out; bind tarsi apparently broad and flattened; hind .t^b - vei^ lJ^;j^ 

 abundant hairy scopa. Jr.»,s colorless; nervures pale; margtnal cell not so 



