AMERICAN HYMENOPTERA. 365 



SYNOPSIS OF EUCERID^l, EMPHOR1DJE AXD 



\\!iionioi:ti)i:. 



BY CHARLES ROBERTSON. 



This is the eighth number of a series of papers on the bees of the 

 neighborhood of Carlinville, Illinois. The terms and signs used here 

 are explained in Can. Ent. 36 : 38-39. 



EUCERID^E. 



Females. 

 Anterior inferior orbits with a small subtriangular malar space; clypeus nearly 



contiguous with eye 4. 



Anterior inferior orbits with a large subtriangular malar space; clypeus rather 



widely separated from eye ; scopa rather slender 1. 



1. Scopa simple, rather dense; nip. 6; lp. 18-31: 7-11; pubescence of thorax 



ochraceous Syualoiiiu. 



Scopa rather thin, with long, sparse, thinly plumose bristles ; mp. 5 ; pubescence 

 of thorax fulvous 2. 



2. Claws with a short inner tooth, that of hind claw about one-fourth as long as 



the outer one; clypeus trilobed ; mandibles with a distinct exterior 

 angle; mp. 2 nearly as long as 3-5, 3 nearly as long as 4-5; scopa 

 nearly black; abdomen nearly black, with appressed glittering hairs; 

 cell III hardly longer than III", shorter than Hit; lp. 21:8; 14-16 



mm. ; ipomoese in Cemolobns. 



Claws cleft, inner tooth of hind claw more than one-half as long as the outer 

 one ; clypeus entire ; scopa ochraceous 3. 



3. Mandibles with a basal internal tooth ; nip. 2-5 regularly diminishing in 



length ; abdomen with more or less interrupted fasciae of appressed, 

 ochraceous pubescence; cell III much longer than III., a little shorter 



than III4 ; lp. 22:14; 15-16 mm.; strenua in XeilOijIossa. 



Mandibles at apex bidendate; mp. 2 and 3 subequal ; segments 2-4 with whit- 

 ish pubescent fascias ; cell III twice as long as Ills, about as long as 

 III4 ; lp. 17 : 12; 12-14 mm. ; pruinosa in Pcpoimpi*. 



4. Scopa rather slender, whitish, sparsely plumose basally ; mp. 5, 1 as long as 



2-3; pubescence of thorax mixed with black; abdomen somewhat 

 metallic, segments 2-4 with fascia? of appressed white pubescence, 

 broad laterally, narrow and basal medially, 5 with a white patch on 

 each extreme side; cell 111 = lilt; lp. 15:6; 12-14 mm.; condignus 



in Florilegus. 



Scopa large ; mp. 4 ; lp. 1 about twice as long as 2 5. 



5. Scopa simple; pubescence of thorax fulvo-ochraceous; segments 2-4 with 



narrow median white pubescent fasciae; lp. 16-8; 16-18 mm.; compta 



in ... ■ Anthedoii. 



Scopa densely plumose; lp. 9-19 : 5-10 MeliKSOdes. 



* Emended from caconym Synhalonia. 



TBAN AM. ENT. SOC. XXXI. (46*) OCTOBER, 1905, 



