1. Pezomachus Pettitii. N. sp.– ♀ .–Head piceous-black, face rufo-piceous, the middle longitudinally prominent; marrdibles fuscous; antennæ longer than head and thorax, pale ferruginous, dusky at tips; thorax nearly as long as abdomen, piceous-brown, paler laterally and beneath; nodes subequal; legs entirely piceous-brown; paler abdomen ovate beyond first segment, shining piceous-black; first segment narrow, slightly dilated behind the lateral tubercles which are not prominent, apical margin pale; sometimes the heas, thorax and abdomen are entirely piceous-black,except the pale band at apex of first segment which is always conspicuous in this species; ovipostor short, about as long as first abdominal segment. Length .14–15 inch.