128 HYMENOPTEEA. 



of the third antennal joint and by a somewhat less distance from each other. Clypeus 

 convex, ovate ; the apex produced into a blunt tooth in the middle. Antennal keel 

 sharply pointed, hardly reaching to the base of the clypeus. The entire head is coarsely 

 and strongly punctured ; below the antennae and the orbits, a little above the antennse, 

 yellow ; covered with long pale fuscous hair. Thorax coarsely punctured throughout, 

 except on the metanotum ; closely covered with rather long pale hair ; black, except 

 two widely separated lines on the pronotum and the metanotum, which are yellow. 

 Abdomen elongate, narrow, longer than the head and thorax united, not quite so 

 strongly punctured as the thorax, and with the pilosity much shorter. Pygidial area 

 sparsely punctured, aciculate ; the sides distinctly keeled, narrowed somewhat towards 

 the base. Tibiae and tarsi yellowish in front ; the hinder pair more or less black in 

 front; the calcaria yellow; the hinder tibiae greatly attenuated at the base; the four 

 hinder coxae and trochanters yellow beneath. 



Very similar in the form of the body to C. pilosa, but smaller ; the antennae shorter 

 and thickened towards the base ; the apex of the clypeus toothed ; the median segment 

 wanting the yellow marks, its area being rugose, &c 



38. Cerceris pilosa. (Tab. VIII. figg. 9, <$; 9 a, clypeus; 9 b, pygidium; 9 c, 



h yp°pyg ium 



Long. 13 millim. <$ . 



Hab. Guatemala, San Geronimo {Champion). 



Eyes almost parallel. Ocelli separated from the eyes by the length of the fourth 

 antennal joint, and by a little less distance from each other, not forming a triangle. 

 Clypeus convex, depressed towards the apex ; the extreme apex flat, broadly and 

 roundly projecting in the middle ; the lateral projection broad, depressed in the centre. 

 Antennal tubercle small, narrow. Antennae of nearly uniform thickness ; the joints 

 oblique at the apex ; the third joint hardly one quarter longer than the fourth. Punc- 

 tuation of the head coarse, deep. Thorax somewhat more strongly punctured than the 

 head; the heart-shaped area impunctate, furrowed down the middle; the bordering 

 furrow finely crenulated. Median segment with a gradually rounded slope. Abdomen 

 longer than the head and thorax united, narrow ; rather strongly punctured ; the 

 petiole longer than broad, narrowed at the apex. Pygidial area opaque, aciculate, 

 bearing large, separated punctures, bulging out gradually at the middle ; the apex 

 transverse ; the sides with coarse punctures. The clypeus, the inner orbits of the eyes, 

 the projecting edges, a line on either side of the pronotum, the tegulae, a mark on either 

 side of the scutellum, the metanotum, a broad irregular mark on the side of the 

 median segment, the apex of the petiole broadly, a narrower band on the abdominal 

 segments 3-5, the anterior and middle tibiae and tarsi, the knees, the hinder trochanters, 

 and the spurs, yellow ; the tibiae lined with black behind. 



