15(> PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxvi. 



with biack; luaxillMvy palpi three segmented. AntenniB .slight!}- moie 

 than t\vi('(> as loiio- as head and very slender heyond second segment: 

 comparative k^ngtiis of segments as foUows: 



Color of antenna' dark brown, except segments three and four and 

 extreme base of five abruptly yellows Spines on first segments quite 

 dark and conspicuous, becoming paler and more indistinct toward the 



tip. 



Prothorax approximately as long as head and a little wider, almost 

 rectanoular in form, ))earing many prominent spines; one at each fore 

 angle and two at eacii hind angle are longest; one half way between 

 fore angle and median line on front margin and one similarly placed 

 on hind mai'gin are intermediate in size; numerous others are smaller. 

 Color of head and prothorax dark browMi. Mesothorax approximately 

 as wide as length of antennse; front angles obtusely rounded; metanotal 

 plate bears four spines close to front edge, the middle pair being large 

 and prominent, the others small; pterothorax yellowish ])rown. Wings 

 present, fully as long as the abdomen, about one-twelfth as broad as 

 k)ng, sharply pointed at ends; surface of wings thickh' covered with 

 minute, dark-colored spines; both longitudinal veins and costa of fore 

 wing thickly and regularh^ set with, quite long, dark colored spines; 

 costa has from twenty -five to twenty-nine, fore vein from sixteen to 

 twenty-two, hind vein from fourteen to sixteen; fore wings shaded 

 with gray; veins not prominent; costal fringe of fore wings weak and 

 less than twice as long as costal spines. Legs moderately long, not 

 thickened; femora dark brown, yellow^ at extremities; tibia? and tarsi 

 yellow; tibiae shaded more or less with brown around middle arfd tarsi 

 with prominent dark In-own spot at tip within; each tibia with a pair 

 of prominent, dark ])rown spines at tip within and a row of from five 

 to seven short brown spines on inner side of hind til)ia\ 



Abdomen about two and one-half times as long as width of meso- 

 thorax, somewhat cylindrical in shape, ]>ut enlarging from base to hind 

 edge of second segment and tapering evenly from eighth segment to 

 tip. Spines along sides and around tip of abdomen very dark brown 

 and conspicuous; those on segments nine and ten are long and sub- 

 equal on both segments. Color of abdomen dark l)rown, shading 

 toward tip; connective tissue yellow; last segment split open al)ove. 



Redescribed from six females; no males found. Compared and 

 identified with Thrqfs {EuthrijyH) maidis Beach. 



Food plants. — Corn, various grasses (first spring flowers, Uzel). 



/A/Z-^Vr/^.— Bohemia (Uzel); Ames, Iowa; Amherst, Massachusetts. 



Life history unknown, except that it hibernates in turf. 



