AMERICAN HYMENOPTERA. 2/ 



Sjrplioetoiiiis rressoMii n. sp. 



9 • — Length 6 mill. Rufous, except head, posterior tai"si and segments of the 

 abdomen beyond the third, which are reddish bhick. The following are yellow 

 tinged with red : large central spot beneath antennse on front, cly]Hnis, mandi- 

 bles, except teeth, which are black, palpi, tegula?, spot in front, lines on margin 

 of mesonotiim, scutellum and post-scutellum. Wings hyaline, stigma large, 

 brown ; fii-st three segments of abdomen finely j)uucttired. the second somewhat 

 acieulated at the sides. The form is broad, plump and short ; antenuse wanting. 



Described from one specimen from Nevada. This specimen is in 

 the Cresson collection, and is dedicated to Mr. E. T. Cresson for the 

 many kind favors shown me in the study of this tribe. 



EXIZE3IUM Foei-ster. 

 Euizemiiiii tibiale Cr. (Bassits), Trans. Amer. Ent. Soc. ii, 110. 9. 



9 • — Length (5 mm. Black, with mandibles, palpi, costse, tegula?. faint line 

 beneath, spots on margin of mesouotum. ])arallel capillary lines back of scutellum 

 and i)ost-scutellum. more or less of trochantere and base of posterior tibiae, white ; 

 posterior tai-si, tibiae, except base, and tips of femora black ; remainder of legs, 

 labium, mesouotum. with lower part of pleui-ae and scutellum, honey-yellow; 

 anteuiife brown. Wings slightly dusky. Abdomen with segments 1 and 2 and 

 most of 3, coarsely punctured, rugose, and coarsely acieulated at the base of the 

 segments; two marginal aud two central cariuae on segment 1, the two latter ex- 

 tending close together about half the length of segment 2. 



% . — Diffei-s in having the sternum and scutellum black ; the eutirti face, scape 

 beneath, prosternum, anterior part of mesouotum, trochanters and four anterior 

 coxae, yellowish white ; rest of legs fulvous (except posterior tibiie and tarsi, which 

 are the same as with the 9 ) aud the three basal segments of the abdomen, which 

 are coarsely longitudinally acieulated. This last character, with the different 

 color markings, may make a new species when more material has been examined. 



Three female and one male specimens from Illinois, ^lontana, 

 Colorado and Canada. 



HO.lIOTKOPrS Foerster. 

 Abdomen black, or with yellow markings. 



Posterior coxae black, or black aud yellow liiiiuoraliii I'lov. 



Posterior coxae same color as femora. 



9 with yellowish white capillary lines on scutellum and post-scutellum, and 

 face without spot; % without yellow markings cm the abdomen. 



bicapillaris Walsh. 



9 with sides of scutellum and usually the capillary lines yellowish white, 



face with white spot ; % with yellowish white band or spots at base 



of third abdominal segment var. albopictiis. 



Abdomen more or less rufous. 



Face without orbital lines (9) pallipeiiiiis Prov. 



Face with orliital lines ( 9 ) or entirely yellow % docoi'ittiis Cr. 



lloiiiotropiis ]i»inoraIi!>> Prov. [Bassits). Faune Ent. Can. ii. 4-29. %. 

 BdssKs fiiscitarsiis Prov., ibid. 430, 9- 

 9 .—Length ti mm. Black, with ehuigate spot on face, sometimes obscure or- 



TR.\NS. AM. ENT. SOC. XXII. FEBRUARY, 1S95. 



