232 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 



Chelonus Jurine. 



Mostly black in color. 



Key to Species. 



1. Abdomen above entirely black, except pubescence, which is 



silvery 2 



Abdomen above not entirely black 5 



2. Length 5 mm. or less 3 



Length 7 mm.; mandibles mostly brownish, palpi brown; 



most of fore and mid femora, nearly all of their tibiae 

 and tarsi, greater part of hind metatarsi, and basal two- 

 thirds of hind tibiae, brownish stramineous sericeus 



3. Hind femora not mostly black 4 



Hind femora entirely or almost entirely black; fore and 



mid femora partly blackish, tipped with brownish yellow, 

 fore and mid tibiae brownish stramineous, hind tibiae with 

 basal and apical third mostly dusky, middle third mostly 

 yellowish with an admixture of brown. Length 3.5 mm. 



fissus 



4. Base of antennae pale yellow; legs pale yellow, except tips 



of tarsi, which are dusky; mandibles yellowish; palpi white; 

 wings hyaline, pale yellowish at base, veins fuscous, .basilaris 

 Antennae black throughout, mandibles castaneous tipped with 

 dusky, palpi dark brown; wings smoky, blackish at base, 

 veins black; femora and tibiae mostly reddish, except as 

 follows: mid and hind tibiae and hind femora each with 

 apical third or more dusky; coxae, trochanters and tarsi 

 blackish. Length 4-5 mm. (female) : sassacus 



5. Abdomen with two yellow areas at base above 6 



Abdomen with a pale yellow band occupying basal third of its 



dorsum; length 3 mm.; palpi yellow; wings hyaline, stigma 

 black; fore and mid legs stramineous, with their tarsi 

 brownish black; hind legs black; trochanters, femora at 

 base, and an annulus on their tibiae, stramineous; abdomen 

 with two longitudinal carinae on basal third of dorsum .... 



basicinctus 



6. Palpi dark brown or blackish; legs colored practically as in 



sassacus except tarsi, which are mostly brownish to dusky 

 with hind metatarsi yellowish tipped with brown. Length 



3-4 mm. (female) konkaputus 



Palpi stramineous, pale; legs practically as in preceding 

 species except second joint of hind tarsi, which is mostly 

 yellowish and tipped with a brown annulus, as are hind 

 metatarsi; abdomen with a maroon-colored dot on each 



side of apical fifth of its carapace-like shield (male) 



mysticorum 



