THE SHIELD-BACKED BUGS. 41 



shrubs and trees about the borders of wet hammocks. Three 

 of the 12 specimens at hand have the fuscous blotches of upper 

 surface wholly absent. The Scutellera viridipunctata of Say 

 (1831, 1) is a synonym. 



III. Chelysoma Bergroth, 1891, 235. 



Species above the average in size and with broadly oval 

 convex form, having the head triangular, longer than wide, 

 its apex obtusely pointed ; cheeks convex, a little shorter than 

 tylus ; beak reaching middle of second ventral, its second joint 

 slightly longer than third and fourth united ; second antennal 

 slightly longer than third, fourth and fifth stouter and sub- 

 equal, each about one-third longer than second ; pronotum with 

 lateral angles obtusely rounded ; scutellum covering apical two- 

 thirds or more of costal margin of elytra; connexivum wholly 

 concealed ; osteolar tube reaching middle of its supporting 

 plate. 



Stal (1867, 493) founded the genus Orsilochus for five species 

 before included by their authors in the old genus Pachycoris 

 Burm. Bergroth (loc. cit.) showed that Stal's name was pre- 

 occupied and proposed Chelysoma in its stead. Four of the 

 known species occur in the West Indies, Mexico or South 

 America, the other in the southern states. 



5 (5). Chelysoma guttatum (Herrich-Schaeffer), 1839, 4. 



Black, shining, both above and beneath, and irregularly marked 

 with numerous coarse punctures, also with bright yellow smooth spaces 

 as follows : head usually with an interrupted line each side and a short 

 median occipital one, disks of pronotum and scutellum with numerous 

 transverse wavy lines, scutellum also with three small irregular spots 

 across the base; front and side margins of pronotum, exposed costal por- 

 tion of elytra and sides of abdomen narrowly edged with bright yellow; 

 first two or three joints of antennae in part or wholly yellow, the fourth 

 and fifth piceous, pubescent; legs yellow, the tarsi fuscous. Abdomen 

 with sides coarsely and rather closely punctate, the middle smooth. 

 Structural characters as given under generic heading. Length 11 — 13 

 mm. ; width 7 — 8 mm. 



Dunedin and Royal Palm Park, Fla., Nov. 17 — April 2. Occurs 

 on the goat's foot morning glory, Ipomcea pes-caprce Sweet, along 

 the bay front in November, and hibernates among the roots 

 of clumps of grass. Jacksonville and Lakeland, Fla., Nov. 3 — 7 

 {Davis) ; recorded also from numerous stations in that State. 

 Mobile, Ala., April 5 — June 4 (Gerhard). Known elsewhere only 



