680 BOSTON JOURNAL 



joints white : nasus sublunate : labrum rouuded 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 

 of tibiae white : posterior pair of tibiae at base white. 



Length nearly one half an inch. 



In form it resembles the female Allantus atra L., and the tho- 

 rax, 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. 



9 Body honey-yellow: antennae, four terminal joints black: 

 nasus deeply cmarginate : 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 : metathorax duskj' near the scutel : abdomen immaculate, 

 rather paler at base and beneath : wings hyaline ; nervures black- 

 ish ; base of the carpus yellowish-white : pectus before and on 

 the middle black : coxae whitish : tarsi pale : posterior thighs and 

 tibia) blackish at their tips. 



Length over three-tenths of an inch. 



A very distinct species, and easily recognized. 



3. E. PLATYCERUS. — Black J tibiae and tarsi white ; first and 

 second joints of the antennae short, equal. 



Inhabits Indiana. 



% Body short, robust, black, polished : antennae rather robust, 

 compressed ; first and second joints remarkably short, when taken 

 together less than half the length of either of the others ; re- 

 maining joints subequal, the third [221] hardly longest : mouth 

 dull piceous : wing-scale dull piceous : wings fuliginous, with a 

 violaceous tinge : feet white; thighs in the middle and coxae black. 



Length less than three-twentieths of an inch. 



The joints of the antennae are shorter and more compressed 

 than those of any other species I have seen. 



4. E. RECENS. — Antennae, basal joint white ; pectus and feet 

 white. 



Inhabits Indiana. 



'S Head black; basal joint of the antennae, nasus, labrum and 



[Vol. L 



