46 
Head normal, triangular; clypeus rather broadly excavated, elon- 
PALO Sarcteln See ree ee eee aR eras tS ae 32. cornelli n. sp. 
Scutellum pale. 
Posterior tibize and tarsi dark brown....----- 33. trilineatus Nort. 
ees aliocether resimous=.ss2eseeee seeneee soe ee 34, magus n. sp. 
Stigma and costa pale. 
Scutellum entirely or for most part black. 
Costa enlarged at apex; small, robust species.. 35. quercus n. sp. 
Costa normal; elongate species. 
Lobes of mesonotum altogether black. .... 36. hyalinus n. sp. 
Lobes with light suturesé. .2222222 2225. 37. vertebratus Say. 
Scoutellum pales. 222 foc c.co ss eset Aa ee eee 38. integer Say. 
AAA. Dorsum pale or with few black spots. ! 
Stigma pale. 
Crest strongly bituberculate. 
Cllanyst topmallo\. sa. 2sc- 3. Second. jase see ee 39. mendicus Walsh. 
Claw samumute ly cle tie = 5 == a4 sees eee 40. vancouverensis n. sp. 
Crest unbroken) straitoliees 22= sess eae eee ,-- 41. koebelei n. sp. 
Crest unbroken, curved anteriorly; stigma narrow, straight on lower mar- 
PUM eee fof PES fous of ee ete, Je Bae eee 42. pinguidorsum Dyar. 
Stigma brown; body without dark markings............4 43. unicolor nu. sp 
Males. 
Procidentia very broad and large.’ 
lon sabe; slender; orbits) blacks. 25.2222 .scsqe essen 44, longicornis nu. sp. 
Sone robust Orbits med dishme sss se -e= ee ace woe seeece noes 27. ribesti Scop. 
Procidentia narrow ; sometimes subobsolete. 
Black; pectus always black. 
Body altogether black, except sometimes mouth parts, pronotum, and tegule. 
Legs, particularly femora and posterior tibis, strongly infuscated. 
Ridges about ocellar basin prominent ...--.------ 45. tridescens Cr. 
Ridges about ocellar basin obsolete -.......--32 46. decoratus Prov. 
Legs pale, except tips posterior tibiwe and their tarsi. 
Clypeus distinctly emarginate; procidentia minute. 
Stigma short, robust; apical half hind tibiz infuseated. 
/ 47. lombarde un. sp. 
Stigma rather clongate, acuminate; extreme tips of hind tibic 
sharply brown. 
1Three species of the luteus group described by Norton are distinguishable by the 
color characteristics. The types are lost, with the possible exception of trivittatus. 
Stigmatus may prove to be a good species. Mendicus and trivittatus are closely 
allied, and probably identical, the older name, mendicus, holding. Monochroma may 
prove to be a light form of mendicus. These species all fall in the table with mendi- 
cus, with which they are closely allied. Stigmatus'and monochroma may be good spe- 
cies, and the original descriptions of them are appended (Nos. 47 and 48). The fol- 
lowing synopsis indicates the color differences of this group: 
Dorsum pale, except tip of scutellum, metanotum, and stripe down tergum 
Q 49. stigmatus Nort. 
Dorsum with a black spot about ocelli and three on lobes of mesonotum; body other- 
WisSepale ws? lass hese ogee Soel 2 cons = sas ee Ae eee ae 2 39. trivittatus Nort. 
Dorsum with two spots on mesonotum, tip of scutellum, and spots on metanotum 
Wale Sete ee aris oe tee ces eee one Ce ee ea ee 2 39. mendicus Walsh. 
Insect altogether pale, including antenne........-......-. 2 50. monochroma Nort. 
2In this character the two following species depart in this sex from the character- 
ization of the genus. 
