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6. S. dimidiatus^ Blackish; elytra and margins of ab- 
dominal segments reddish brown ; feet pale. 
Inhab. U. S. 
Body piceous -black : head oval black, with two punctures 
between the eyes, two punctures on the posterior anthus and 
five or six behind : mouth piceous : antennce, first and sec- 
ond joints and part of the third yellowish, or reddish brown 
more or less pale : thorax black, with a tinge of piceous ; 
dorsal series five and an equal puncture more distant than 
the others, near the anterior margin, and a little exterior to 
the line of the series ; lateral punctures two, or in a much 
curved line three ; marginal two : elytra reddish-brown, 
with prostrate hairs : abdomen^ segments reddish-brown on 
their posterior margins : feet yellowish, or pale reddish- 
brown. 
Length nearly one-fifth of an inch 
I have found specimens in Pennsylvania and Missouri. 
The reddish-brown colour of the posterior margins of the 
abdomen, is obvious beneath. Fam. 1st. 
7. S. tachiniformis, Black ; thorax sanguineous; feet pi- 
ceous. 
Inhab. Mexico. 
Body black : head rather small, oval, polished ; with two 
punctures each side between the eyes,^ and eight or ten be- 
hind the eyes: antennce fuscous, dark piceous at base : 
mouth piceous : thorax sanguineous ; dorsal punctures five 
distant from the base and tip; lateral two; marginal three 
placed triangularly : elytra with a slight, obscure metallic 
tinge, with numerous minute punctures furnishing prostrate 
hairs : feet honey-yellow ; posterior pair and tibice and tarsi 
darker. 
Length one-fourth of an inch. Fam. 1st. 
8. S. apicialiSf B'ack; terminal joint of the antennse and 
abdomen towards the tip, rufous. 
Inhab, U. S. 
Body black, polished, punctured : head with numerous 
punctures, smooth in the middle : anteimpe with the termi- 
nal joint yellowish-rufous : mandibles piceous : jpaf/pi with 
the terminal joint rather long, slender, piceous: thorax with 
numerous not crouded punctures, with a longitudinal, dila- 
