G. C. DAVIS. 217 



the lateral apical corners broadly yellow ; the entire pleura and sternum are pale 

 ferruginous. 



Type specimen from Illiuois (coll. A.mer. Ent. Soc). 



Exocliiis ostentatiis n. sp. 



% . — 6 mm. Head yellow, except teeth, spot enclosing ocelli and part of occiput, 

 which are black; antennse rufous, scape yellow; mesonotum rufous, with a nar- 

 row black border; seutellums and remainder of thorax, except the black meta- 

 notum, pale yellow ; legs yellowish wiiite, with black annulus at apex of femora 

 and tibise and longitudinal stripe on tarsi beneath on hind legs; abdomen black, 

 with narrow apical margins and broad lateral apical corners of all the segments 

 (least so on first and second) yellow ; dorsum of abdomen and thorax pilose and 

 coarsely punctured ; metathorax with first and second lateral areas united ; ba.sal 

 segment of abdomen strongly carinate; wings hyaline, stigma and nervures 

 reddish brown. 



One specimen from District of Columbia (coll. Amer. Ent. Soc. ). 



This specimen diifers so much structurally as well as in color 

 markings from pal/ipe--^ and pleuraUs that I feel warranted in giving 

 it a new name. 



Exofhus flHvifroiitalis u. sp. 



2 %, . — 9- 5 mm.; "^ . 3..5 mm. Black, with face, mouth parts and scape be- 

 neath, lemon-yellow; coxtE black, tinged with rufous; four anterior legs, except 

 coxpe, fulvo-ferruginous: posterior femora black or dusky, rufous at base, whitish 

 at ajiex ; tibise honey-yellow, white at base; posterior tarsi white; antennie 

 black, jjaler beneath toward base: wings hyaline; abdomen broad, coarsely and 

 rather closely punctui-ed ; caringe at base short ; metathorax with first and second 

 lateral areas united ; ujesonotum polished, finely punctured. 



Two specimens from Michigan and Nevada. The Michigan speci- 

 men was taken in a larch tree May 2. Type, coll. Amer. Ent. Soc. 

 and G. C. D. 



Exochiis prupinquiis Cress., Trans. Amer. Ent. Soc. ii, 114. 



9 %i . — 7-8 mm. Black, 9 shining and polished, except on mesonotum and 

 face, which are coarsely punctured, the latter densely so; % in addition to that 

 of the 9 liiis the abdomen finely punctured ; metathorax completely areolated ; 

 antennae dusky rufous or brown; front beneath antenna? usually with a yellowish 

 inverted V ; palpi and legs rufous ; tegulse yellowish white ; wings nearly hyaline, 

 nervures and stigma reddish brown ; basal segment of abdomen with strong 

 carinte reaching beyond the middle ; antennal joints not strongly incised. 



Four females and four males, Michigan, Connecticut, Maine and 

 Massachusetts (Cresson). Type, coll. Amer. Ent. Soc. 



Exoeliiis afri<'Ox:ili!« Cress., Trans. Amer. Ent. Soc. ii, 114. 



9 % . — 7-8 mm. Black, with abdomen and mesonotum coarsely and rather 

 closely punctured; face closely punctured as usual; legs sometimes entirely ru- 

 fous, but usually with all the coxa? black ; antennse dark brown or black, thickset 

 and with joints incised, so that the segments are more distinct than in propiiiqiins ; 

 teguliB pale yellow ; the other markings, which are sometimes wanting, or present 



TRANS. AM. ENT. SOC. XXIV. ('^B) AUGUST, 1897. 



