Patton. ] ‘ 390 (January 21, 
LARRA DISTINCTA (Smith). 
Both sexes of this species vary in having two or three of the basal 
segments of the abdomen red; intermediate forms are rare, but both 
the red-marked and the black varieties are equally common and 
occur together. 
L. distincta is peculiar for having the labrum slightly produced and 
deeply notched in the middle. The mandibles are distinctly biden- 
tate in both sexes. The clypeus is broadly and abruptly, but 
slightly produced, and is transversely impressed near the apex; the 
margin armed with three teeth on each side in the 9, the lateral 
teeth being the angles of the process and the inner teeth being the 
angles of the smooth border, in the male only two teeth are present 
on each side and the border is more rounded out. The front is 
prominent, the anterior ocellus in an isolated pit, the area behind it 
not prominent and not bilobed. The posterior ocelli are obliquely 
distorted and narrowly drawn out. The eighth ventral segment of 
the ¢ is broad and entire at the apex. ‘The ciliation of the anterior 
tarsi of the ¢ is short, the bristles equalling the third tarsal joint in 
length. 
LARRA ACUTA Rh. sp. 
?. Length 8-9 mm. Black; head, thorax, antennae and legs clothed 
with a very fine silvery pubescence, the pubescence more distinct on 
the face and longer on the metathorax; three basal segments of the 
abdomen when viewed from behind with a broad apical silvery band, 
in other lights these bands disappearing and the basal portion of the 
segments having a silvery reflection. Mandibles piceous in the 
middle, strongly bidentate within like the mandibles of Tachytes. 
Clypeus not dentate, broadly but slightly produced, the sides of the 
process angular; labrum distinct, entire, medially impressed; head 
and thorax finely and closely punctured, the anterior portion of the 
clypeus more coarsely punctured and bordered by a transverse 
impression. The front and the disk of clypeus swollen, a depres- 
sion, angulated above, between. the eyes and antennae on each side 
of the face; two slight elevations just above the antennae, between 
which is an impressed line extending to anterior ocellus and von- 
tinued above over the prominence and through the depression on 
vertex; posterior ocelli obliquely distorted into an ellipse, but not 
drawn out into a linear appendage; eyes approaching on the vertex, 
their inner border sinuous. Mesonotum abrupt anteriorily, its 
