AMERICAN HYMENOPTERA. 353 



back of head, two bands (not connected) from mandibles outside of 

 orbits and continued upward on inner orbit to above antennas and two 

 inner oval dots above base of antennae, yellow white; mandibles and 

 palpi ferruginous; tegulae, broad edges of anterior angle (with a brown 

 spot in centre) a slender line on prothorax back of neck, a dot on each 

 side of scutel before, two spots on neck beneath, a dot on middle of 

 pleura, six spots on the sides of the six basal segments of abdomen and 

 a minute apical dot near ovipositor, white ; legs dark reddish yellow, 

 tarsi blackish; wings hyaline; apical half faintly clouded, a small 

 obscure spot on upper wings beyond lanceolate cell; under wings with 

 two middle cells. 



Conn., Mass., N. Y. August. 



A specimen from Canada has but two white lines on vertex, no dot 

 on apical segment of abdomen and the lower middle cell of under wings 

 with incomplete cross nervure, (Coll. Am. Ent. Soc). 



Dr. Harris, states that they are found on the trunks of trees of soft 

 wood, in August. 



2. X maculata. 



Xiphj/dria maculata, Say, Bost. Jour. i. 18.^.5, 221, % . 



''Abdomen black, with seven lateral white spots. Length over two-fifths of 

 an inch." 



" S . — Black; head punctured on the front; with two small spots 

 above the antennae; anterior and inferior orbits extending in a line 

 behind the eye, base of the mandibles and two lines upon the vertex, 

 white; thorax confluently punctured; about four short white line 

 upon the disk ; a white spot before the wings, wings immaculate ; tergum 

 with seven lateral, emarginate white dots; beneath, on the neck and 

 pectus with a few white spots; feet honey yellow." 



This is probably the male of X. alhicornis. A specimen from Rev. 

 L. Provaucher, Canada, has the antennae 19-jointed ; all but the basal 

 and apical joints whitish on the basal half; thorax coriaceous; scutel 

 large, triangular, the angles acute, with side-edges sharp, hinder angle 

 nearly bidentate; the inner orbital line terminating at about the mid- 

 dle of eye; a white dot at summit of each eye; no white lines on mes:>- 

 thorax ; seven lateral spots on tergum. 



S. X. tibialis. 



Xiphydria tibialis, Say, Long's, 2n(l. Exp. ii. 1824, 312, 2. 



Xiphydria mellipes, Harris, Cat. 1835. Inj. Ins. 2nd. Ed. 429. 



" Black, four lateral spots of the abdomen, first tarsal joints and base of the 

 tibise, white. Length more than two-fifths of an inch. 



Stethidium rough with confluent punctures, immaculate; wings 

 hyaline, nervures dark fuscous ; feet black; tibiae white, fuscous at 



TRANS. AMEK. ENT. SOC. (46) JUNE, ISOtl. 



