362 HYMENOPTERA OF AMERICA. [PART I. 



notched. It quite approaches Pterochilus in its general forms 

 and in the shape of the clypeus. It only differs from these by the 

 labial palpi being small, 4-jointed and not pectinate. 



It has the same geographical distribution as the Pterochilus, 

 being the southern type of the genus. In America it has only 

 been found in Mexico as yet; in the old world it is spread over 

 the southern part of Europe and the temperate part of Africa, 

 north and south 



155. E. denticulatllS Saitss. (Fig. 30, 30a.)— Validus, niger, fulvo- 

 hirtus ; pronoto, post-scutello, abdominisque segmentis liavo-limbatis ; 

 secundo segrneuto, utrinque macula rufa ; antennarum basi et pedibus 

 badiis. — £, . Clypeo liavo, apice uigro ; feuioribus iutermediis emargi- 

 natis ; tibiis posticus dilatatis. 



Leptoclulus denticulatus S auss. Rev. de Zool., VII, 1855, 373. ' 



Total length, 14 mm. ; wing, 11 mm. 



Appearance of a Pterochilus, but the labial palpi small, quaclri 

 articulate, not pectinate. Mandibles knife-shaped, with three 

 little notches. Thorax ovate, round ; first abdominal segment 

 cup-shaped, or widely spoon-shaped, not very sessile; its base 

 subpedunculate. Second segment short. The whole insect 

 densely punctured and hirsute with long fulvous hair. 



Black. Anterior margin of pro thorax and. post-scutel sulphur- 

 yellow. Wing scales ferruginous or yellowish. The abdominal 

 segments all adorned with a sulphur-yellow margin, rather wider 

 on the 3d, 4th segments than on'the 2d ; the margin twice notched 

 with black on the segments 3-6; the 2d segment adorned besides 

 with two large ferruginous lateral spots. Feet ferruginous or 

 yellowish, black at base. Wings subhyaline, soiled with gray- 

 ferruginous. 



Var. Post-scutel black; tegulae maculate with yellow. 



%. Clypeus wide below; attenuated at its summit; its apex 

 but little prolonged, truncate, biangulate. The surface yellow, 

 clothed with silvery hair, except on its extremity which is black 

 and strongly punctured. Antenna 1 very long, black, with the first 

 two joints ferruginous, yellow anteriorly; the last joints quite 

 compressed, annulate with yellow, principally below. Inter- 

 mediate femora of rather different form, strongly canaliculate 



1 Erratum. — Page 373, line 19th, instead of Tibias, read Fades. 



