48 DAVENPORT ACADEMY OF NATURAL SCIENCES. 



BB. Posterior margin of vertex elevated and carried forward in the 

 middle, vertex marginmg the eye behind, narrowing away toward 

 the outer margin, spots on pronotum nearer the middle than the 

 posterior margin, sutural margin of elytra usually light. 

 C. Species narrow, little more than i mm. in breadth, only one 

 spot on vertex next eye. 

 D. 9 segment deeply roundingly emarginate, central apical 



cell of elytra parallel margined novella, V. D. 



DD. $ segment roundingly produced, the apex with a 

 shallow notch, elytra very long with the central 



apical cell wedge-shaped tenella, n. sp. 



CC. Species broader, nearly 2 mm. in width, three dark points 



on vertex next each eye, elytra maculate oculata, V. D. 



AA. Pronotum coarsely transversely rugulose except for two spots on the 

 anterior margin, dark markings absent or in the form of longitudinal 

 bands. 



B. Species light cinereous or whitish, spots on vertex small, elytra 

 subhyaline, nervures light. 

 C. Elytra much longer than abdomen, narrow behind, costa nearly 



straight, 9 segment long, deeply cleft uhleri, V. D. 



CC. Elytra short and convex, only slightly exceeding abdo- 

 men, $ segment short, only slightly notched, cmerea, n. sp. 

 BB. Species darker, the spots on vertex large, usually with other 

 markings, elytra subhyaline or fuscous, the nervures distinctly 

 darker. 



C. 9 segment with posterior margin deeply cleft, {(J' plates nar- 

 row, tubular). 

 D. Species stout, elytra broadly convex, 9 segment with four 



triangular points, (^ plates narrower behind 



bigelovia, Bak. 



DD. Species smaller, wedge-shaped, 9 segment with two lat- 

 eral points, (^ plates tubular gillettei, n. sp. 



CC. 9 segment nearly truncate behind, slightly notched. {<^ plates 

 broad, nearly flat) sattgidnolenta, Prov.* 



*The peregrinans of Stal if, as believed, belonging xo Agallia and including specimens 

 we have from California, would tall in this synopsis next to sanguinolenta, but differing 

 from that species, particularly in the form of the male plates. 



Agallia 4-punctata Prov. (Plate I., Fig. i.) 



Bythoscopus 4-pimctata, Nat. Can., IV., p. 376, 1872. 



Ulopa canadensis, V. D. (nymph). Trans. Amer. Ent. So ., XIX., p. 301, 

 1892. 



Short and stout; elytra broad, convex, at rest wider than across the 

 eyes; uniformly smoky-gray above except for two black spots on the 



