SUBFAMILY III. — ACANTHOSOMINvE. 



207 



149 (206). Elasmostethus atricornis (Van Duzee), 1904, 75. 



Size and form of cruciatus. Above greenish-yellow; antennae black- 

 ish, the incisures paler; humeral angles of pronotum black, this merging 

 into dark reddish-brown along the hind margin and on inner and apical 

 margins of elytra, disk of scutellum and connexivum ; under surface 

 reddish-brown, the last two ventrals piceous, shining. Head a little 

 shorter and broader than in cruciatus, the cheeks with only two or three 

 punctures and a few very fine wrinkles. Pronotum more finely and very 

 sparsely punctate, the punctures concolorous with the disk. Punctures 

 of scutellum finer and more unevenly and sparsely placed than in 

 cruciatus. Basal plates of female genitalia a little shorter and more 

 triangular than there. Sixth ventral of male very deeply concave to 

 receive the broad convex genital plate, the latter with hind margin 

 rounded, entire and ciliate. Length, 9 — 10 mm.; width, 5 — 5.5 mm. 



Putnam and Vigo counties, Ind., Aug. 21 — Sept. 18. In both 

 counties it was found in numbers and mating, but only on the 

 leaves and stems of spikenard, Aralia racemosa L., growing on 

 the sides of deep damp ravines. Outside of Indiana it is defi- 

 nitely recorded only from Montreal, Canada, New York and 

 Maryland, though Van Duzee (loc. cit.) says "so far as my 

 observations extend this seems to be our most common north- 

 ern species of Acanthosoma." It will probably be found on the 

 Aralia throughout most of the range of that plant. 



Superfamily COREOIDE^E Reuter, 1910, 78. 



This superfamily comprises Heteroptera of large or medium 



size, possessing the characters 

 given in the family key and hav- 

 ing the head porrect or nearly 

 so, not transversely impressed; 

 scutellum triangular, small or 

 medium in size, but not reaching 

 middle of abdomen ; elytra com- 

 posed of clavus, corium and 

 membrane ; veins of membrane 

 numerous, more or less anas- 

 tomosing; hind femora often 

 swollen ; tarsal claws with arolia. 

 The superfamily is represented 

 in our territory by three fam- 

 ilies, two of which are by Van 

 Duzee and others treated as subfamilies of the Coreidae. 



dorsal view of head 

 of a Coreid, Anasa 

 b, same of a Coriscid, 

 Covinous pilosulus (H.-S.) ; c, lateral 

 view of same. (After Parshley). 



Fig. 41. a 

 and pronotum 

 repetita Heid 



