Here is a 2nd individual of this Pentatomid, documented about 12 days after the first. The species name "atrispinus" comes from Biologia Centrali-Americana (Hemiptera 17-1, p. 67; pl. 5, fig. 22) but I don't know if the species has been transfered to a different genus. The red margins of the prothorax and corium flanking the black humeral spines are apparently diagnostic.
https://www.biodiversitylibrary.org/item/14630#page/83/mode/1up
https://www.biodiversitylibrary.org/item/14630#page/483/mode/1up