SUBFAMILY I. PHANEROPTERIN.T3. 489 



females, who produce the sound by a sudden upward jerk of the wings. 

 "Both sexes are for the most part silent during the day, but during the 

 period of their greatest activity their stridulations are never for an houi 

 remitted, from the time the great setting sun hides behind the purple 

 curtains of the west till he begins to shed his scarlet rays in the east 

 the species being so numerous that the sound as it comes from the woods 

 is one continuous rattling, not unlike the croaking of frogs, but set to a 

 higher key." 



222. MICROCENTRUM RETiNERVE (Burmeister ) , 1838, 692. Smaller Angu- 

 lar-winged Katydid. 



Size medium for the genus, the sexes subequal. Smaller than rhom- 

 Mfolium which it very closely resembles. Fastigium as there but slightly 

 narrower, more distinctly sulcate. Pronotum with front margin truncate, 

 not toothed: humeral sinus more narow. Tegmina proportionally shorter, 

 less strongly tapering, their tips more broadly rounded, surpassing hind 

 femora one-third their length. Front and middle femora with only one 

 or two very minute spines beneath. Male with stridulating field narrow, 

 the cross-vein usually pale brown; cerci longer than in rJiomltifoliiim, less 

 incurved, their apical third distinctly swollen; subgenital plate with outer 

 carinse converging, both apex and a*pical notch distinctly narrower than in 

 rhombi folium. Other differences as given in key. Length of body, $ , 

 2022, $, 2426; of pronotum, $, 55.5, $, 5.56.5; of tegmina, $, 

 3638, 9, 3841; of hind femora, $ and $, 1820; of ovipositor, 5.5 

 6.5 mm. Width of tegmina, 12 13 mm. 



Martin Co., Ind., Aug. 20, one male; Yigo Co., Ind., Sept. 26, 

 one female; Plummer's Island, Md., Sept. 10 (W. >S Y . B.}. Prob- 

 ably occurs throughout the Austral life zone of the southern third 

 of Indiana. Recorded from Florida only by Scudder (1877a, 83), 

 who states that "a male, a female and two pupae were taken at Ft. 

 Reed between April 24 and May 2." 



The known range of retinerve is more southern than that of 

 rhombifolium, extending from New Jersey west through southern 

 Indiana, Kentucky and Clarksville, Tenn., to Kansas and Ne- 

 braska, and south and southwest to central Georgia, Oklahoma, 

 Texas, New Mexico, Arizona and, if Brunner's record (1878, 340) 

 can be relied upon, to Orizaba, Mexico, and Guatemala. It ap- 

 pears to be a common form on Plummer's Island, Md., as I took 

 three males there in a few hours' collecting on Sept. 10. They 

 were found on the ground or the branches of low shrubs. Bruner 

 has recorded it as not common but more widely distributed in 

 eastern Nebraska than rJioiHbifoliion. From the records the males 

 seem to far outnumber the opposite sex. 



VI. STILPXOCHLORA Stal, 1873a, 40. (Gr., "glisten" -f "green.") 

 Species of very large size, having the fastigium horizontal, sul- 

 cate, slightly wider than first antennal joint, its apex obtuse; eyes 



