330 
GEO. H. HORN, M. 1). 
Yarlatiom . — Two forms may l)e separated in this species, those 
witli tlie i)ubescent spots well marked and those without them. The 
former variety shows some pubescence at the sides of the thorax and 
at the sides of the last three ventral segments. Those without spots 
show in nearly all the specimens the spaces with denser fine punc- 
tuation, but even this may be absent. In the typical specimens, as 
Crotch states, there is a tendency to form a basal and subapical spots. 
Between the specimens with no spots and the others I have every 
necessary link in my cabinet. 
The median thoracic imjn'ession is, at best, faint, but in some speci- 
mens entirely wanting, in others represented by a slight antescutellar 
depression. 
Hah. — d'exas (Belfrage), Arizona. 
.4, laciistris Lee. — Moderately elongate, nearly parallel, slightly depressed 
above, color variable, dark bronze, green or bine. Antennfe piceous. not reaching 
the middle of the thorax, serrate from the fifth joint: head convex, a feeble 
median furrow from the occiput to the middle of the front, surface roughly 
puuctate-strigose. Thorax scarcely wider than long, the sides feebly arcuate, 
slightly sinuate near the hind angles, these rectangular with a short fine carina, 
margin straight, deflexed in front only; disc convex, sometimes with a vague 
median impression, the lateral depressions absent, surface transversely and 
rather closely strigose, with fine punctures; scutellum variable, either carinate 
or not; elytra feebly sinuate at sides and but little dilated behind the middle, 
apices rounded, serrulate; disc slightly flattened, basal fovea feeble, surface 
closely and rather roughly imbricate; body beneath more or less blue; proster- 
nal lobe broadly rounded, intercoxal process rather broad, truncate at apex, pro- 
pleurse strigo.se and punctate, sparsely pube.scent ; metasternum at sides trans- 
versely strigose, not roughly nor closely. Abdomen transversely strigose, not 
roughly nor closely; pygidium sparsely punctate, not carinate; claws broadly 
toothed. Length .16 — .30 inch.; 4— 7.5 mm. 
Male . — Front scmiewhat more opaque. Prosternum densely punc- 
tured and hairy. Metasternum concave ami hairy; first two ventral 
segments rather deejtly impressed their whole length, the impression 
hairy; tibite simple. 
Female . — Prosternum coarsely sculptured, transversely strigose, 
but not hairy. Metasternum slightly convex, transversely roughly 
strigose, not hairy ; ventral segments not imjiressed. 
Vaviatmu . — The color varieties have already been recorded. The 
blue forms are, however, very rare. The scutellum may be trans- 
versely carinate or not, sometimes the carina is interi-upted in the 
middle. Fully developed specimens usually have the carina very 
distinct; in the small and feeble forms it is wanting. The same is 
true of the feeble median depression of the thorax. 
