186 THE CANADIAN ENTOMOLOGIST. 



Vertex very large, the lateral margins widening before the eyes for 

 more than the length of the eye, then abruptly rounding to the obtusely 

 angulate apex. Front very long and extremely narrow between the 

 antennae, slightly widening to the ocelli, the disc very Hat, and sharply 

 angled with vertex, entire margin back to ocelli thin and foliaceous. Elytra 

 long and coriaceous, slightly exceeding the abdomen ; venation obscure, 

 the veins with large, sparse, black tubercles. Male valve semicircular, 

 plates long, triangular, their apices slightly attenuate. 



Colour: Vertex and pronotum soiled white, irregularly irrorate with 

 fine brown points, slightly heavier around the vertex margins. Traces of 

 three orange stripes on vertex and some orange shading on anterior half 

 of pronotum. Elytra pale, very finely and evenly irrorate with brown. 

 The veins faintly milky-white and sparsely ornamented with shining black 

 tubercles. Traces of powdery white on the disc of corium. lace creamy, 

 heavily irrorate with brown, omitting the usual line on the carina?. 



Described from a single male from Chico, California. Collected by 

 the author. 



Jfacrofsis graruiis, n. sp. — Form of bisignai 'a nearly, much larger, 

 green, the male heavily black marked. Length, 9 > 5-75 mm.; £ , 5 mm. 



Vertex strongly inflated, half longer on the middle than against the 

 eye. Pronotum long, the disc convex and strongly wrinkled. Elytra 

 broad, appressed posteriorly in the male, whole surface covered with fine 

 hair. Venation obscure and rather weak, often a number of reticulate 

 veins between the sectors and along costa. 



Colour : Female uniformily light green in life, sometimes with a 

 brownish tinge in old specimens. Male shining black above, except for 

 the narrow lateral margins of the pronotum and the costal third of the 

 elytra before the apical cells, pale green. Below pale green, the black 

 extending down onto the face nearly to the antennal sockets on the side. 

 Some of the males are much lighter, lacking most of the dark on the 

 vertex and pronotum, and often on the apical third of claval areas. 



Genitalia : Female segment moderately long, posterior margin 

 truncate, with the median half cut out one-third the depth of the segment, 

 the margins of the cut rectangular ; male valve twice the length of the 

 ultimate segment, the margins parallel, considerably exceeded by the long 

 narrow pygofers. 



Described from eight examples collected in Colorado and Utah by 

 the author, and two females received from Arizona. 



