NORTH AMERICAN HYMENOPTERA. 127 



half above. Legs blackish, the pubescence ochraceous, apical joints of tarsi fer- 

 ruginous, scopa whitish. Abdomen opaque, firet segment with ochraceous pubes- 

 cence at base and on sides, apex rather broadly pale testaceous, basal margin of 

 second with a narrow fascia of appressed ochraceous pubescence, broad apical 

 margins of segments 2-4 with dense, appressed, white fasciae, pubescence of fifth 

 and sixth segments black or fuscous, beneath the abdomen has dense, ochraceous 

 pubescence. Length 12 mm. 



% . — Resembles the female, the pubescence being longer and thinner, tegulse 

 and nervures sometimes darker, segments 2 4 of abdomen with margins sometimes 

 more evidently testaceous, fascia at base of second segment white, fifth segment 

 also with a white fascia, and sixth with pubescence sometimes black, sometimes 

 pale; clypeus, lab rum and mandibles at base pale yellow, the latter at apex with 

 an orange-yellow streak ; third joint of antennae as long, or twice as long, as 

 second, fourth longest of all, flagellum fulvous beneath, apex of tibise and the 

 tarsi ferruginous, or sometimes the knees and the tibise and tarsi entirely ferru- 

 ginous. Length 11-12 mm. 



Hab. — Illinois ; one female, three males. 



Melissotles |>alli<la 9- — Black, clothed with pale pubescence, which 

 inclines to ochraceous on tlie thorax above ; face rather closely pubescent, clypeus 

 closely and strongly punctured, mandibles rufous in middle, with a yellow streak 

 at apex, antennae black, third joint about equaling next two together, flagellum 

 dull testaceous beneath. Thorax above densely pubescent, except on disc of 

 mesonotum and scutellum, more sparsely punctured on former. Wings subhyaline, 

 second submargiual cell a little smaller than first, third narrowing one-half above, 

 nervures dull testaceous, tegulaj piceous. Legs black, apical joints of tarsi ferru- 

 ginous; pubescence pale ochraceous, becoming fuscous on apex of tibiae and tarsi, 

 scopa pale, on the basal joint of hind tarsi within it is black. Abdomen opaque, 

 basal segment with pale puljescence at base and laterally, base of second and 

 broad apical margins of segments 2-4 with appressed white pubescence, segments 

 5 and 6 with black pubescence, the abdomen beneath has the pubescence fuscous, 

 paler towards apex. Length 14 mm. 



Hab. — Illinois ; one female. This looks Like the female of Sijnha- 

 lonia frater, but is a little smaller, and has paler legs, etc. 



9Ieli!SSO<Ie»$ nivea 9 • — This species closely resembles M. perplexa Cr., but 

 is distinguished by the pubescence being longer, more dense and more whitish ; 

 the anterior margin of occiput above with few fuscous hairs, mesothorax with 

 dense cinereous pubescence, except about bare space on posterior margin of meso- 

 notum and scutellum, where it is slightly fuscous. Wings whitish hyaline, the 

 nervures testaceous. Legs with pale pubescence, except sometimes on anterior 

 tarsi, where it is tinged with fuscous, scopa white ; first segment of abdomen with 

 posterior margin pale testaceous, the fasciae on segments 2-4 more broad and white 

 than in M. perplexa. Length 10 mm. 



Hab. — Illinois ; seven females. 



TRANS. AM. ENT. SOC. XXII. MAY. 1895. 



