153 HYMENOPTERA. 



1. Oxybelus mexicanus. 



Oxybelus mexicanus, Robins. Trans. Am. Ent. Soc. xvi. p. 83 \ 

 Hah. Mexico 1 . 



^ 2. Oxybelus bugabensis. (Tab. IX. figg. 20, thoracic process; 20 a, lateral 

 view of the same ; 20 b, thoracic process, var. 1 ?) 



Niger, linea pronoti, lineis abdominis segmentis l°-5 m flavis, segmento 6° rufo ; alis fusco-hyalinis. $ . 

 long. 5 millim. 



Hal. Panama, Bugaba (Champion). 



Black, with a greenish-coppery hue ; the mandibles reddish ; the pronotum, tubercles, 

 the scutellar laminae, a broad line (much contracted in the middle) -on the first 

 abdominal segment, a narrower (not contracted) line on the second to the fifth 

 segments, and a line on the base of the middle femora beneath, yellow ; the tegulae 

 piceous ; the front tibiae rufo-testaceous, the spurs pale ; the apical abdominal segment 

 piceous-red ; wings subhyaline, the nervures fuscous. Head very closely punctured, 

 densely covered with a short pale pubescence ; the front slightly depressed in the 

 middle ; a not very distinct furrow runs down from the ocelli to the antennae, where 

 it bifurcates, the forks being wider, deeper, smooth, and shining. Eyes margined. 

 Antennae stout, densely pilose ; the flagellum beneath at the apex brownish. Thorax 

 more strongly punctured than the head, and with the punctures more widely apart. 

 Mesonotum with a wide and deep furrow in the centre in front ; and there is a much 

 smaller furrow on either side of this ; scutellar keel distinct, the depression at the base 

 of the scutellum wide and deep. Median segment shining, reticulated. There is a 

 wide and deep furrow below the tegulae on the mesopleurae, and a shallow fovea behind 

 it. The pubescence on the thorax short, close, and dense; that on the pleurae longer 

 and whiter. Abdomen shining, finely punctured ; pygidial area more strongly punc- 

 tured, laterally keeled. Legs rather closely pilose ; the spines on the hinder tibiae 

 stout, fuscous towards the apex. Squama broader than long, the sides acutely spined, 

 the apex roundly incised; the spine is twice longer than broad, slightly incised at 

 the apex, hollowed, and rising in a curve upwards, hardly dilated at the tip. 



A specimen from Temax is either a variety of 0. bugabensis, or belongs to a distinct 

 species. It agrees in size and colour with 0. bugabensis, except that the yellow line on 

 the collar is interrupted, the squama is only yellow laterally, and the yellow band on 

 the first abdominal segment is not dilated at the sides ; all the tibiae are broadly lined 

 with yellow ; the pubescence on the face is denser, longer, and bright silvery ; the 

 mesonotum is duller, more pubescent, and has a wider and deeper depression. There 

 is also a slight difference in the space of the thoracic process (see fig. 20 b). 



