IOWA ACADEMY OP SCIENCES. 
201 
DELTOCEPHALUS ALBIDUS N. SP. 
(PI. xxiii, Fig. 1.) 
Clear milky white; a transverse line on the middle of the 
vertex, a circle around the tip and four stripes on the pronotum, 
black. Elytra flaring with reflex, dark margined costal vein- 
lets. Length, 4 25 mm. Width of elytra on center of costa, 
1.75 mm. 
Vertex rather more than twice longer on middle than at eye, longer 
than width between the eyes, anterior angle slightly acute. Front broad, 
strong, twice wider on ocelli than at clypeus, sides straight, angle of the 
vertex less than forty-five degrees; genas short, rounding, outer angle 
obscure; pronotum two and one-fourth times wider than long, feebly emar- 
ginate posteriorly; posterior angle indefinite. Elytra flaring, without an 
appendix, obtusely rounding posteriorly; venation distinct, the two outer 
apical veinlets strongly reflexed to the costa, the third one at nearly right 
angles to the costa and with the apices of the second and third anteapical 
cells forming nearly a straight line to the tip of the clavus, thus leaving 
two costal cells and three terminal cells, of which the outer one is the 
largest. 
Color: Pearly white; above, tip of vertex triangularly margined with 
dark; a transverse slightly curved line on vertex, four longitudinal stripes 
on pronotum, the inner pair continuing across the scutellum and extending 
forward on to the base of the vertex, where they diverge, dark brown or 
blackish. Sutural and apical margins of elytra and anterior margin of the 
three outer veinlets lined with black. An oblique interrupted band from 
the tip of the scutellum to the center of the elytra, deep black. Tergum 
lined as in larvae, the outer pair of stripes meeting above on the pygofers, 
forming a black V. Abdominal pleurites with a black margin and central 
dot. 
Genitalia: Male valve large, acutely angled; plates twice the length of 
valve, narrowly, slightly concavely, pointed. Ultimate ventral segment of 
female twice the width of the penultimate; posterior margin divided into 
three broad lobes, central lobe notched one-half its depth. Described from 
numerous specimens. 
Larvae: Pearly white with four narrow brown stripes. Vertex acutely 
angled, three times as long on the middle as next the eye; body narrow; 
abdomen long, gradually tapering, acutely pointed. Color, pearly white 
above with two brown stripes arising just under the tip of the vertex pass- 
ing up either side on to the disk, where they broaden, narrowing again 
toward the base, extending as narrow parallel lines ending abruptly on the 
posterior margin of the ultimate segment; a broad stripe on either side, 
arising behind the eye and extending back along the dorsum just inside of 
the white margin, meeting at the tip of the abdomen. A white spot on 
each abdominal segment within this stripe; a narrow white lined triangle 
on anterior third of vertex enclosing the point. Below, two stripes arising 
within the first pair just under the vertex, running broadly and obliquely 
across the face just under the eye, obscure or wanting on the thorax, mar- 
gining the connexivum and meeting on the genitalia. Legs with small 
