206 FAMILY VI. ACRIDIDJE. THE LOCUSTS. 



dian one on occiput; hind femora reddish or purplish-brown; hind tibiae 

 red, the spines tipped with black. Head of male but slightly shorter than 

 pronotum, of female, distinctly shorter. Vertex as described in key, the 

 angle at juncture of frontal costa and fastigium rather broadly rounded. 

 Hind margin of pronotum broadly obtusely angled. Tegmina slightly 

 surpassing tips of hind femora in both sexes. Subgenital plate of male 

 with apex forming a short, rather blunt compressed cone. Length of 

 body, $, 2937, 9, 4051; of pronotum, $, 4.G G, 9, 7 8.4; of tegmina, 



$, 20 27, 9, 3036; of hind femora, $, 1721, 9, 2530 mm. 



(Fig. 78, B.) 



The above is a description of the form placed under Serville's 

 name bivittata by Kehn, specimens of which were examined by me 

 at Philadelphia. It is very close to the typical form of M. itiacu- 

 lipenms Bruner (1890, 54) described from Texas, the females be- 

 ing very difficult to separate. 



As placed above M. bivittata ranges from eastern North Caro- 

 lina and northern Florida west to central Texas and northward 

 west of the Mississippi to West Point, Nebraska and Keokuk, 

 Iowa. From Florida it is known only by two males, taken at 

 Pablo Beach and Ft. Barrancas. According to Rehn it frequents 

 for the most part ''areas of rich high grass, with or without inter- 

 mingled weeds." At Lane, S. Car., it was locally abundant "in the 

 high grasses of long-leaf pine woods," while in Texas it was found 

 on grasses in both post oak and open short-leaf pine forests. 

 Adults occur from June 30 (Texas) to Oct. 1 (Iowa). 



In the past this species has been much confused with M. ma- 

 cuUpennis and its variety, macclungi, but in addition to the char- 

 acters given above it differs generally by the color which is a 

 "more decided and richer green and a clearer, more transparent 

 red-brown." 



87. MERMIRIA MACULIPENNIS MACCLUNGI Rehn, 1919, 111. McClung's 



Locust. 



Form slender for the genus. Pale wood-brown or dirty cream-buff 

 more or less greenish-yellow beneath; behind each eye a rather wide pur- 

 plish-brown stripe usually extends backward to hind margin of pronotum; 

 head of male sometimes with a similar median stripe; antenna? and hind 

 tibise reddish; tegmina in both sexes with a narrow greenish submarginal 

 stripe on basal half; wings transparent; knees of hind legs and tibial 

 spines tipped with black. Fronotum but slightly narrowed at middle, me- 

 dian carina distinct, metazona two-thirds the length of prozona, finely 

 reticulate; hind margin feebly subangulate. Tegmina and hind femora 

 reaching the tip of abdomen, female, slightly surpassing it, male. Length 

 of body, $, 2632, 9, 3645; of antennae, $, 1315, 9, 1214; of pro- 

 notum, $, 4.15, 9, 5.57; of tegmina, $, 1923, 9, 2732; of hind fe- 

 mora, $ , 1518, 9 , 2126 mm. 



