432 U. S. NATIONAL MUSEUM BULLETIN 216 part 3 



chanters bro\\T:i at base above; hind trochanters whitish, the basal 

 0.5 ± of the first hind trochanter dark browTi; femora ivory, the front 

 and middle femora pale to dark brown above and hind femm- dark 

 brown or black behind; tibiae and tarsi ivory, the fifth segment of 

 front tarsus pale brown, fifth segment of middle tarsus medium brown, 

 and apical half of fifth segment of hind tarsus brown ; wings hj^aline. 



Female: Unknown. 



Specimen: cf , Cameron, La., June 20 to 30, 1905, James S. Hine 

 (Townes). 



27. Camera, new genus 



Figure 321,b 



Front wing 6.0 to 11.5 mm. long; body of moderate proportions; 

 frons unarmed ; mesoscutum moderately convex, polished or subpolished, 

 its punctures mediimi sized, strong, usually dense; notaulus moderately 

 sharp, reaching to or beyond center of mesoscutum; epomia moderately 

 strong; propodeum strongly convex, its two transverse carinae simply 

 arched or the apical one with its median portion displaced forward a 

 little, the basal carma strong and complete, the apical carina strong, 

 forming low sublateral crests, its median portion usually weaker and 

 irregular or partly obsolete; propodeal spiracle elongate elliptic; 

 areolet small or very small, subrectangular or subpentagonal, a little 

 higher than wide, the second intercubitus moderately strong; ramellus 

 absent; nervulus opposite basal vein to basad of it by about 0.3 the 

 length of nervulus; base of second discoidal cell broad; mediella 

 weakly arched, its median portion almost straight; nervellus broken 

 somewhat below the middle; axillus moderately divergent from anal 

 margin, rather long; first abdominal segment moderately short to 

 moderately long, with a subbasal lateral tooth, its spiracle rather far 

 behind its middle and postpetiole rather strongly expanded or swollen, 

 with or without the ventrolateral and dorsolateral carinae, the median 

 dorsal carinae absent; apex of first sternite between spiracle and apex 

 of first tergite; second abdominal segment polished or subpolished, its 

 punctures medium sized to fine, in either case closely spaced; tergite 

 7 without a median white spot; ovipositor sheath about 0.27 as long 

 as front wing; ovipositor rather slender, compressed, its tip elongate 

 sagittate, the point slender. 



Genotype: Mesostenus euryaspis Cameron. 



The generic name is from the Latin camera (an arch), referring to 

 the strongly convex abdominal tergites. 



There is only one Nearctic species, which ranges from Mexico into 

 southern Texas. We have seen four additional species of the genus 

 from southern Brazil, three of them undescribed and one named 

 Christolia thoracica by Szepligeti in 1916. 



