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220 Say^s Descriptions of 



Inhabits Indiana. 



Q Bodu black : nntpnn/p wltb tTirpp p 



lahrum 



at tip, white, or with a dusky disk: palpi^ terminal 

 joints whitish ; wing-scale whitish : wings very slightly 

 tinged with fuliginous ; carpus white on the basal half : 

 feet^ tarsi and coxae white : anterior pairs of tibiae white ; 

 posterior pair of tibiae at base white. 



Length nearly one half an Inch. 



In form it resembles the female of Allantus atra^ L. 

 and the thorax, as well as the abdomen, is entirely black. 



2. E. semicornis. Honey-yellow ; tip of the antennae 

 and disk of the pectus black. 



Inhabits Indiana. 



terminal 



black : nasus deeply emarginate : labrum and mouth pale 

 yellowish, the former rounded at tip: stemmata black: 

 thorax with a dusky line on the two middle lobes : scutel 

 dusky on the posterior edge : mctathorax dusky near the 

 scutel: aldomen immaculate, rather paler at base and 

 beneath: wings hyaline; nervures blackish; base of the 

 carpus yellowish-white : pectus before and on the middle 

 black : cox<b whitish : tarsi pale : posterior thighs and 

 tibiae blackish at their tips. 



Length over three tenths of an inch. 



A very distinct species and easily recognised. 



Black ; tibiae and tarsi white ; first 



cerus 



and second joints of the antennae verj- short, equal. 

 Inhabits Indiana. 



^ Body short, robust, black, polished : antenna rather 

 robust, compressed ; first and second joints remarkably 

 short, when taken together less than half the length of 

 either of the others ; remaining joints subequal, the^hlrd 



