IOWA ACADEMY OF SCIENCES. 45 



of the vertex, very roundingly angled below. Elytra broad, and 

 short, the costral area wider than adjacent cells, first sector forking 

 before the cross nervure. 



Color; vertex and pronotum black, coarsely and irregularly 

 dotted with yellow; on the pronotum the wrinkles are yellow, the 

 pits black. Scute lum black, broken lines on the margins, u median 

 line on the posterior half, and a pair of lines on anterior disc 

 enclosing a number of yellow spots. Elytra red, with the nervures 

 black; sometimes the disc is slaty blue, with light margins to the 

 nervures. Front black, with round white spot^. Below black, 

 sometimes marked with yellow. As seen from side, a narrow yel- 

 low line extends around the vertex in front on a level with the eye 

 and runs from the lower corner of the eye to the lateral margin of 

 the abdomen and on back to the pygofers. 



Genitalia; female segment twice the length of the preceding, 

 truncate, or verv slightly emarginate posteriorly, the lateral angles 

 often depressed, leaving a semicircular disc; male plates, tri- 

 angular, one fourth longer than their basal width, as long as the 

 pygofers. 



Specimens are at hand from Ontario, District of Colum- 

 bia, Virginia, Florida, Alabama, Tennessee, Mississippi, 

 Manitoba, Minnesota, Iowa, Dakota, Nebraska, Arkansas, 

 Texas, Montana, Wyoming, Colorado, Idaho, Washington, 

 New Mexico, and Nicaraugua, Central America. 



XJ VAR LIMBATA. SAY. 



^ Tettigonia Hmba(a,Sa\. Jou-. Acad. Nat. Sc. , Phila. , IV, p. 340, I825. 

 "X Tettigonia septentrio/ialis, Wn\kr Homop. Supp. , p. 193,1858. 



Usually somewhat smaller and narrower than the typi- 

 cal form, often with longer elytra, which gives them a 

 somewhat linear appearance. 



Color, shining black, vertex and face usually with a few rather 

 large yellow spots; pronotum with two ocellate orange spots well 

 back of the anterior margin and in line with the ocelli; sometimes 

 another pair on the outer angles of the scutellum. Below black, 

 the lateral line extending from the eye back, broad and distinct. 



Specimens of this variety are at hand from Colorado, 

 Dakota and Iowa, and it has been reported from Michigan 

 and Canada, and Walker's species was from the Mackenzie 

 river. The white lateral line will at once separate it from 

 the black form of T. hierogli/phica, which it somewhat 

 resembles. 



The species, as a whole, occurs from the Mackenzie river 

 and Nova Scotia south throughout the whole continent, 

 and to northern South America at least. It is somewhat 



