OXYBELUS. 157 



3. OxyMuS longispina. (Tab. IX. fig. 21, thoracic process.) 



Niger, linea pronoti, lineis abdominis segmentis l°-5 m , femoribu&tibiisque subtns flavis, abdominis segmento 6° 



nigro ; alis fere hyalinis, nervis stigmateque fusco-testaceis. J , 

 Long. 5 \ millim. 



Hab. Mexico, Teraax in North Yucatan (Gaumer), 



Black, with a slight coppery hue ; an interrupted line on the pronotum, the tubercles, 

 the laminae, a line on the four anterior femora beneath at the base, and a narrow line 

 on the apex of the abdominal segments, yellow; the tibiae rufo-testaceous, lined with 

 yellow in front ; the tarsi obscure testaceous. The lower part of the head covered 

 with a dense silvery, the upper part with a golden pubescence. Clypeus incised, the 

 sides ending in stout teeth. *• Antennae densely pilose, the apex brownish. Mandibles 

 piceous-red. Thorax closely punctured, and covered with a whitish pubescence; 

 scutellar keel stout, the scutellum also with a transverse keel at the apex, the space 

 beyond this being depressed and crenulated. Median segment transversely striolated, 

 with a V-shaped keel in the centre. Mesopleurae with a narrow shallow furrow below 

 the tegulae, and there is a wider transverse furrow at the bottom. Abdomen finely 

 punctured, the basal segments deeply depressed anteriorly ; apical segment obscure 

 rufous, punctured, the apex transverse ; the segments at the apex bearing a sparse pale 

 pubescence ; venter covered with longish pubescence, punctured. Squama with a 

 curved tooth laterally ; the spine more than twice longer than broad, becoming broader 

 towards the apex, which is deeply and broadly incised. 



>y 4. OxybelllS azteCUS. (Tab. IX. figg. 22 ; 22 a, thoracic process.) 



Niger, lineis 2 pronoti, maculis 10 abdominis, tibiis tarsisque flavis ; alis fusco-byalinis. 

 Long. 4 millim. 



Hab. Mexico, Vera Cruz (H. II. Smith). 



Black, densely covered with a silvery pubescence ; the scape of the antennae beneath, 

 a broad interrupted line on the pronotum, the tubercles, a small mark on the side of 

 the scutellum, the edges of the laminae, two lines on the abdominal segments 1-4, the 

 knees, and the four anterior tibiae in front, yellow; mandibles yellow at the base, 

 piceous in the middle, black at the apex ; apex of antennae rufo-testaceous ; tegulae 

 piceous ; apical segment and the apex of the fifth ferruginous ; the anterior tarsi rufo- 

 testaceous. Head closely and rather strongly punctured, the pubescence on the lower 

 part long and silvery; clypeus convex; the furrow from the ocelli indistinct. Eyes 

 indistinctly margined in front. Thorax more strongly punctured than the head ; the 

 pronotum above transverse, margined, the sides obliquely curved ; 4 an indistinct furrow 

 on the mesonotum in front ; scutellar keel not very stout. Median segment finely and 

 closely rugose, two keels in the centre, enclosing a V-shaped, shining, impunctate area ; 

 the edges also keeled. Mesopleurae with a small shallow depression below the tegulae. 

 Abdomen punctured ; the first segment depressed at the apex, the second at the base 



