S32 - HYMENOPTEKA. 



cerata, moreover, has two oblique marks of silvery pubescence on the mesonotum and 

 the flagellum of the antennae reddish. 



\l 36. Sphaerophthalma areta. (Tab. XIV. fig. 12, $ .) 



Long. 11 millim. $ . 



Hal. Panama, Bugaba, 800 to 1500 feet {Champion). 



Head a little wider than the thorax, closely and coarsely punctured ; a large square 

 patch of golden pubescence on the vertex, the sides of the vertex and the front sparsely 

 covered with rather long black hair ; the oral region and the lower outer orbits covered 

 with silvery hair ; the base of the mandibles covered with longish silvery hair ; the 

 antennal tubercles shining, impunctate. The eyes project beyond the back portion of 

 the head, this being about one-fourth longer than the width of the eyes. The scape 

 of the antennas slender, curved, and covered with rather long silvery hair ; the base of 

 the flagellum with shorter hair; the third joint about as long as the fourth and fifth 

 joints united ; the apical joints beneath reddish. The thorax above coarsely punctured 

 and covered with short black hair ; down the sides from the middle is a broad band 

 of scattered golden hair. The base of the mesothorax is transverse, with the angles 

 acute and triangular on the lower middle portion, the upper part being narrowed and 

 rounded ; the basal part is broad, with the sides straight and ending in a sharp 

 triangular tooth, there being also a blunt intermediate tubercle. The median segment 

 is narrowed and stoutly denticulate at the sides ; the apex is oblique. The pleurae 

 are smooth and impunctate, the lower part in the middle with silvery pile ; there is 

 an oblique keel on the mesopleura. The basal •abdominal segment has no mark ; the 

 sides have long silvery hair. The second segment is closely and coarsely punctured, 

 and covered with stiff, black, short hair; at the extreme base are two small oval 

 marks, and nearer the apex are two larger oval marks of a more yellowish hue. The 

 other segments are fringed laterally with long white hair. The ventral segments are 

 fringed with long silvery hair; the basal segment is keeled in the middle, but not at 

 the sides, and the apex is oblique. The legs bear long silvery hair ; the tibial spurs 

 are of moderate length and are curved ; the calcaria are white. 



Compared with S. ipsea this is a smaller and narrower insect, and, apart from the 

 different arrangement of the markings, may be easily known from it by the head 

 being much more developed behind the eyes. 



The following three species have the head, thorax, abdomen, and legs black ; the 

 head and thorax bearing silvery pubescence ; the abdomen with two large orange or 

 golden macular : — 



