264 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 



ends of the femora, and the tibiae are red: the tarsi are dark brown with here and 

 there a reddish tinge. Wings uniformly deep fuliginous, with a bluish, or at some 

 angles a greenish, reflection. 



This form seems to come nearest to Kohl's variety nobilitatum. 



Chlorion (Priononyx) striatum (Smith). 

 Eight female specimens. Length, 18-26 mm. 



Chlorion (Priononyx) thomae (Fab.). 



Three female specimens. 



Chlorion (Priononyx) simillimum, sp. nov. 



? Sphex neoxenus Kohl, 9 , Ann. natur. Hofmus. Wien, 1890, 5, p. 363. 

 ? Sphex ommissus Kohl, cf, Ann. natur. Hofmus. Wien, 1890, 5, p. 364. 



Female. Black, without pubescence. Wings uniformly fuliginous, with a green- 

 ish reflection as far as the outer ends of the cells, the outer margins with less reflec- 

 tion, and this rather violet than green. 



Head quite large, quadrate when viewed from above. Central portion of the 

 clypeus strongly swollen ; the anterior margin somewhat reflexed and with a pro- 

 nounced central notch in a slight depression ; its surface glistening, not closely 

 punctured, and bearing black hairs of medium size. Frons considerably excavated 

 near and above the antennal insertions, rather more closely and finely punctured 

 than the clypeus, and with traces of transverse striations along the sides of the 

 well-marked frontal suture from the antennae about halfway to the median ocellus. 

 Ocellar area enclosed by three impressed lines, the posterior line arched backward 

 and crossed by the frontal suture, which is present between and behind the ocelli. 

 The lateral impressed lines extend behind the ocelli a short distance and end just in 

 front of, and lateral to, a small macroehaeta on either side. Distance between the 

 lateral ocelli less than between the ocelli and the eyes ; median ocellus much larger 

 than the lateral ones. Upper part of the frons and the vertex minutely, not closely, 

 punctured. Cheeks above more than half the width of the eye, but narrowing 

 quickly downward ; with scattered punctures and hairs, the latter larger and longer 

 below. Inner margins of the eyes parallel. Antennae black, the scape with a fer- 

 ruginous tinge below ; the filament somewhat grayish sericeous : first filament seg- 

 ment nearly two-thirds as long as the second and third together. Mandibles long, 

 stout, black, tinged with ferruginous at the tip and along the middle of the lower 

 (outer) margin; with numerous aciculations and black hairs. 



Thorax black. Collar rising quite abruptly from the neck, its dorsal edge quite 

 broad from front to rear, rounded, and also evenly rounded from side to side for 

 some distance, then quickly bending downward, the sides bearing faint striations. 

 Surface of the anterior face and dorsal edge of the collar somewhat glistening, 

 sparsely punctured. Sides of the neck and collar, and the upper part of the pro- 

 thoracic lobe, obliquely striate except a small tubercle anterior to the upper part 

 of the prothoracic lobe, which is smooth and glistening. The prothorax below the 

 lateral sutures is coarsely punctured, and near the coxae has a few faint trans- 

 verse striations. Margin of the prothoracic lobe fringed with short brown hairs. 



