AMKPvICAX HYMENOPTKPv.A. 20!) 



following three segments bro:ullr, the second ventral sefrnient, except for a large 

 black mark in the centi'e, this mark being broad at the base and apex, obliquely 

 narrowed from both ends towards the middle and tlie other segments, bright sul- 

 phur-yellow. Legs sulphur-yellow, the coxse behind, trochanters and basal two- 

 thirds of the hind coxa' black. 9- Leugth (total) 7 mm. 



Ciypeus pyriform, broadly rounded above, the apex with a distinct semi-circu- 

 lar incision; it is strongly, moderately closely punctured. Front and vertex 

 closely, rugosely punctured, the pro- and mesothorax being more strongly punc- 

 tured. Base of thorax transverse, the sides not projecting. Base of postscutellum 

 rounded, its apex transverse. Median segment strongly aciculated ; the sides 

 rounded, coarsely punctured ; the large, black cential mark is roundly dilated 

 on the sides, the top narrowed, with straight sides. First abdominal segment 

 cup-shaped, with a short, but distinct pedicle at the base, strongly punctured, 

 especially towards the apex; the second is as wide as long, weakly punctured, 

 except at the apex, where the punctuation is much stronger; the other segments 

 are aciculated. punctured distinctly at the apex. Antennae stout, the apical 

 joints brownish. 



Orrasby Co., Nevada. 



What is perhaps the male of this species has tlie .second ventral 

 segment black, except at the apex ; the yellow mark on front is 

 much wider above, it becoming gradually wider from the bottom to 

 the top, forming a triangle ; the clypeus is broader compared with 

 tlie length and has an apical incision as long as it is wide at the 

 apex. A. pelias comes close to A. spilogaster, which may be known 

 from it by the projecting sides of the pronotum, by the absence of 

 the broad yellow marks on the metanotum, by the two spots on the 

 second abdominal segment being enclosed in the black, and by the 

 densely haired body. A. lineativentris has also the body densely 

 haired, the clyi)eus broadly black in the middle, and the metanotum 

 not yellow laterally. 



The group of fundatus Cress 

 The line on first abdominal segment dilated laterally, the second 

 with an enclosed yellow spot, the legs for the greater part red, 

 mixed with yellow. 



An<'istrocerns fundatus Cress. 

 This species has been taken at Fedor and Lee Co , Texas. 



4nci*<tr<»oerus ventonesii sp. nov. 

 Black ; a longish mark, dilated above, narrowed on the lower half, touching 

 the yellow on the clypeus. a mark on the inner eye oibit. basal half of mandi- 

 bles, a short line on the outer orbits, two large marks, widest on the innerside 

 and not reaching to the middle, a small mark in the centre of the mesouotum, 



TKANS. AM. ENT. .SOC. XXXIV. {21) .JULY. 190b. 



