IOWA ACADEMY OF 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 pronolutn, 

 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 clypcus, skies straight, angle of the 

 vertex less than forty-five degrees; genie 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 tbe 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 larvse, 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 loba 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 pa,ir just under the vertex, running broadly and obliquely 

 across the face just under the eye, obsouro or wanting on the thorax, mar- 

 gining the connexivum and meeting on the genitalia. Legs with small 



