202 EMBRIK STRAND, 
hairs on the outer margin. Head thick and slightly convex, nearly 
twice as broad as long, subrectangular, the posterior angles slightly 
rounded, closely punctured, with a short, longitudinal, frontal suleus. 
Eyes small, almost round, not touching the base of the mandibles. 
Scape curved, punctured, with golden hairs beneath, more than half 
as long as the flagellum. Pronotum closely punctured, much narrower 
than the head, as broad posteriorly as long, nearly twice as broad 
anteriorly as posteriorly, the anterior margin strongly trilobed, the 
middle lobe depressed and very sparsely punetured. Scutellum and. 
median segment sparsely punctured, about equal to each other in 
length, combined as long as the pronotum; the median segment 
broadened and very sharply sloped posteriorly. Abdomen half as 
long again as the head, thorax and median segment combined; the 
first segment narrow at the base, more than twice as broad at the 
apex, smooth and shining, with a few scattered punctures, the apical 
margin slightly raised, with a transverse groove before it; second 
sesment with a transverse carina near the base and another near 
the apex, the intervening space coarsely transversely rugulose, the 
apical margin raised with a very wide transverse groove before it: 
third, fourth and fifth segments shining and very sparsely punctured; 
fifth ventral segment rugose. Pygidium more than twice as long 
as broad, rounded at the apex, almost vertical; the dorsal plate not 
reaching beyond the middle, slightly convex and almost pointed at 
the apex; the ventral plate deeply emarginate anteriorly and very 
delicately longitudinally striated. 
Black; a curved band on the front above the base of the an- 
tennae interrupted in the middle, a broad transverse band before 
the apex of the first dorsal abdominal segment, a large spot on each 
side of the second, fourth and fifth segments and a transverse band 
rarely interrupted in the middle on the third segment yellow; man- 
dibles and antennae fuscous; spines of the tibiae and tarsi testa- 
ceous. 
Leneth 11—14 mm. 
Hab. Tucuman, North Argentina. 
Sixteen females in the collection, four pairs being taken in co- 
pula. Both sexes are nearly related to other species of the lateralis 
group. 
