CEECEETS. US 



long fuscous hair ; the apex of the clypeus without teeth. Thorax more strongly punc- 

 tured than the head. The heart-shaped area of the median segment shining, coarsely 

 striolate. Abdomen strongly punctured; petiole nodose; pygidial area shining, 

 narrowed to the apex, and with large punctures. The basal ventral segment is punc- 

 tured ; the others are aciculate, and covered densely with golden pubescence, the apical 

 segments with white pubescence. Cubitus almost triangular, the recurrent nervure 

 received before the middle. The third antennal joint is nearly three times, the fourth 

 twice, the length of the second. A broad triangular mark on the cheeks, an inter- 

 rupted line on the pronotum, the tegulae, the metanotum, and a broad band on the 

 abdominal segments 2-6, ochreous-yellow ; flagellum rufous beneath towards the base ; 

 the four anterior tibiae and tarsi testaceous ; the hind calcaria yellowish. 



Apparently nearly related to C. maocimiliani ; but has all the abdominal segments 

 (except the petiole) yellow, and the heart-shaped area of the median segment striolated. 



7 



8. Cerceris geniculata. (Tab. VII. figg. 7, head, ? ; 7 a, clypeus ; 7 b, ditto 

 from the side.) 



Nigra, facie, basi mandibular um, lineis duabus pronoti, scutello, maculis duabus segmento mediali, margi- 

 nibus abdominis segmentis 1°, 3°, 4°, 5°, tibiis tarsisque anterioribus, flavis ; alis hyalinis, antice fusco, 

 stigmate sordide fulvo. $ . 



Long. 10 millim. 



Hab. Mexico, Cuautla {coll. Saussure). 



Eyes slightly converging beneath. Clypeus convex in the centre, the apex trans- 

 verse, five-dentate. Hinder ocelli separated from the eyes by somewhat less than the 

 length of the second and third antennal joints united and by the length of the third 

 from each other. Head closely rugosely punctured, shortly pilose ; a keel runs down 

 from the ocelli ; the cheeks covered densely with silvery pubescence. Third antennal 

 joint shorter than the first and not much longer than the fourth. Thorax strongly 

 punctured, the punctures on the mesonotum longer than broad, elongate ; on the median 

 segment they are round and much deeper. The heart-shaped area of the median seg- 

 ment smooth, punctured at the edges ; middle of the metapleura smooth, impunctate, 

 shining ; metanotum punctured. The pubescence on the thorax is short, close, and 

 fuscous in colour. Abdomen with the punctuation closer and not so strong as on the 

 thorax ; petiole short, much broader than long. Pygidial area slightly and roundly 

 narrowed at the base, the apex rounded ; rufous, darkened at the base, irregularly 

 transversely striolate. Apical ventral segments densely pilose. Legs covered with a 

 close, fine, silvery pubescence ; the tibial and tarsal spines glistening white. 



n/ 9. Cerceris feralis. 



Long. 7-7f millim. 



Hab. Mexico {coll. Saussure). 

 biol. cente.-amek., Hymenopt., Vol. II., October 1890. qq 



