COCKERELL : FOSSIL HYMENOPTERA FROM FLORISSANT. 43 



with b. n. ; first s. m. on cubital nervure about 630 long, its lower edge straight 

 (which distinguishes it from Halietoides) ; second the same length, but only 360 long 

 on marginal, the second t. c. with a double curve ; first r. n. entering second s. m. 

 about 150 from base, second about 60 from apex; breadth of second discoidal at 

 base 195, at apex about 390. Compared with Halietoides maurus it differs by the 

 second s. m. being much broader above, and receiving the second r. n. nearer its 

 end, by the larger and narrower second discoidal, and the lower edge of first s. m. 

 practically straight. Compared with Hesperapis rhodoceratus, the insertion of the re- 

 current nervures is different, and the second r. n. in particular is quite different in 

 its direction, etc. ; the straight lower edge of first s. m. agrees. Compared with 

 Parandrena andrenoides, the stigma is smaller, and the second discoidal is not so 

 broad apically. It does not agree with Diandrena or Biareolina. 



Type. — No. 2009, Mus. Cornp. Zool. Florissant, Col. (No. 9061, S. H. 

 Scudder Coll.). 



A second example (No. 8560, S. H. Scudder Coll.) shows that the legs are 

 dark and hairy ; the mandibles bidentate, the inner tooth rounded and small ; 

 flagellum about 195 /* broad ; abdominal bands not well preserved, but a dark 

 patch at apex. This example shows the same curiously prominent eyes as the 

 type, hence it does not seem likely that the feature can be due in some acci- 

 dent of crushing. The eyes stand out on each side of the head to an extent of at 

 least 300 fi, forming an angle with the anterior part of the face, which appears 

 quadrate, twice as broad as long. The eyes of Parandrena are prominent, espe- 

 cially in the male, but they do not look like those of Libellulapis. 



Halictus florissantellus, sp. nov. 



9 Length about 6| mm. ; stout-bodied ; head, thorax, abdomen, and legs black ; 

 width of thorax 2 mm., of abdomen slightly more ; length of anterior wing some- 

 what over 4 mm., stigma and nervines dark ; middle tibia very much broader than 

 basal joint of its tarsus (breadth of tibia 263 /*, of basal joint of tarsus 120) ; b. n. 

 strongly curved, normal for Halictus, curved part 465 /n long, straight (upper) part 

 about 150 ; t. m. a little oblique, a little basad of b. n., but not separated from it by 

 an interval, its lower end more apicad, as is normal for Halictus ; width of second 

 discoidal at base 225 ; stigma large, about 165 fi broad ; marginal cell about 270 

 broad, ending in a point on costa ; wings quite hairy in costal region anterior to 

 stigma ; first r. n. joining cubital nervure 690 /t from base; submarginal cells not 

 traceable. 



Type. — No. 2010, Mus. Comp. Zool. Florissant, Col. (No. 921, S. H. Scudder 

 Coll.). 



Although only part of the venation is preserved, this, and the general appear- 

 ance of the insect, agree with Halictus, and the generic reference seems safe. 



Halictus scudderiellus, sp. nov. 



9 Length about 4| mm., anterior wing about 2f; intense black, including legs 

 except tarsi, which are pale reddish ; antennae stout, breadth of flagellum about 



