N0 . 1124. REVISION OF THE MELANOPLI SC UDDER. 35 



ending roundly; lateral margins of the subgenital plate almost straight, 

 the apex well rounded; pallium capable of a considerable pyramidal 

 erection. 



Length of body, male, 13 mm., female, 18 mm.; antennae, male and 

 female, 6 mm.; tegmina, male, 2.75 mm., female, 3.2 mm.; hind femora, 

 male, 8 mm., female, 10.5 mm. 



Eight males, 12 females. Montelovez, Cohahuila, Mexico, September 

 22, E. Palmer. fU.S.N.M. STo. 704, male and female.] 



The antennae of the male are scarcely, so long in this species as in 

 the others; it differs decidedly from E. concinnus in the bent and narrow 

 cerci as well as in the more nearly quadrate interspace between the 

 mesosternal lobes of the male; from E. pilosus, to which it seems more 

 nearly allied and for which I at first mistook it, it differs in the cerci of 

 the male, which do not narrow before the middle, in being a smaller 

 insect, besides having a duller coloring with more contrasted markings, 

 to judge from Stal's description. 



3. RHABDOTETTIX PILOSUS. 



Pezotettix pilosus STAL, Bih. Sv. Vet.-Akad. Handl., V, No. 9 (1878), pp. 10-11. 

 Paraidemona pilosa BKUNXER, Rev. Syst. Orth. (1893), p. 145. 



I have not seen this species, and accordingly give Stal's description, 

 englished. The description is mainly a comparative one, the basis of 

 comparison being Aidemona azteca, next which Stal placed it, in the 

 same section of Pezotettix. 



Olivaceous ; legs yellowish olivaceous ; hind tibiae greenish olivaceous, 

 the base and geniculatioii proper of the hind femora black; tegmina 

 rudimentary. Length of male 16 mm. 



Male. Interspace between mesosternal lobes a little longer than 

 broad, with parallel sides, much narrower than the lobes themselves; 

 metasternal lobes subcontiguous ; eyes large, rather convex; apical 

 margin [of the pronotumj gradually and obtusely sinuate, slightly 

 emargmate in the middle, destitute of a lobe; supraanal plate fur- 

 nished with a gradually narrowing sulcus, extending beyond the 

 middle of the plate; cerci gently curved, compressed and rather broad 

 throughout, before the middle slightly narrowed; subgenital plate 

 short, very strongly recurved; abdomen posteriorly tumescent and 

 somewhat recurved. 



Distinguished from Aidemona azteca by the front and prozona less 

 densely punctate, frontal costa obtusely subsulcate, narrower between 

 the antennae, the sides parallel but slightly narrowed at the base, the 

 interspace between the eyes narrower, the disk of the pronotum 

 smooth, abbreviate and truncate anteriorly, the metazona about half 

 as long as the prozona, tegmina rudimentary, widely separated, ellip- 

 tical, extending slightly beyond the median segment, shorter than the 

 pronotum, the abdomen blunter at tip, posteriorly more tumid and 

 recurved, the cerci broader, the last dorsal segment of the abdomen 



