132 HYMENOPTEBA. 



there is a line and two lateral marks on the apex of the fourth. The knees, the tibiae 

 in front, the anterior tarsi in front, and the spurs are yellow ; the spines are glistening 

 yellowish-white. 



The male has a rounded-triangular mark above the antennae (the narrow end in 

 front), a large mark (truncated and narrowed behind, and roundly incised in front) on 

 the front, and the orbits of the eyes to the eye-incision yellow ; otherwise coloured 

 as in the female, except that the metanotum is black, and the yellow on the abdominal 

 segments is much reduced. The antennae are longer, subclavate. The triangular area 

 is rugose throughout, and the furrow is obscured by the punctures. 



! 3. Philanthus maculifrons. (Tab. VIII. fig. 13, s .) 



Niger, capite maculis 9, linea pronoti, scutello, metauoto, geniculis, tibiis tarsisque flavis ; alis fusco-hyalinis. $ . 

 Long. 10 millim. 



Rah. Mexico, Jaral near Guanajuato {Schumann). 



Ocelli in a triangle ; the hinder ocelli separated from the eyes by the length of the 

 first and second antennal joints united, and from each other by the length of the fourth, 

 and in a deep pit. Clypeus with the apical half depressed obliquely inwardly ; the 

 apex broadly and roundly projecting. Antennae subclavate; the third joint twice the 

 length of the fourth. Head shining, rather strongly punctured, sparsely covered with 

 long pale silvery hair. Thorax shining, sparsely haired, strongly punctured ; the 

 scutellum and metanotum impunctate; the median segment closely, strongly, trans- 

 versely punctured, the basal area impunctate in the middle, its central furrow wide and 

 crenulated, the apex suboblique. Abdomen nearly as long as the head and thorax 

 united, shining, sparsely haired ; the punctures large, deep, and widely separated, more <p 



particularly towards the apex. Pygidial area sparsely punctured. <^Fetiole rising 

 obliquely from the base, and becoming depressed again towards the apex ; looked at 

 sideways, forming a semicircular curve. A large mark on the clypeus (wide and roundly 

 incised at the apex), a broad line (widest at the apex) along the eyes (having a small 

 yellow mark below it, clearly separated by a narrow black line), a somewhat triangular 

 mark over the antennae, two marks behind the ocelli, a more elongate and larger mark 

 behind the eyes, the edge of the pronotum, the tegulae, the tubercles and a mark in 

 front of them, the scutellum, the metanotum, a broad band on the base of the second 

 segment, a narrower band on the apices of the third, fourth, and fifth segments, the sides 

 of the sixth segment, a mark on the sides of the third and fourth ventral segments, and 

 the scape, knees, tibiae, and tarsi, yellow. The first recurrent nervure is received in the 

 middle of the second cubital cellule, the cubital nervure being angled at this part ; the 

 second cubital nervure a little beyond the second transverse cubital nervure. 



Very closely related to P. mnthostigma ; but differing from it in having two marks 

 behind the eyes, the scutellum, and metanotum yellow, the knees, tibiae, and tarsi 



