454 PROCEEDINGS OF THE NATIONAL MUSEUM vol. in 



suture nearly straight, lateral angle weakly produced; membrane little 

 longer than basal width, slightly surpassing apex of abdomen. 



Propleuron: Front half of anterior convexity with crowded, promi- 

 nent, longitudinal rugae and few punctures; depression with few coarse 

 punctures; prosternal carinae more than half as high as labial II, 

 abruptly terminated posteriorly. 



Mesoplcuron : Evaporatorium reaching into posterolateral angle, 

 not to lateral margin of segment; lateral area strongly rugopunctate 

 anterior to evaporatorium. 



Metapleuron : Terminal modification of peritreme very large, semi- 

 circular, reaching lateral margin of evaporatorium; lateral area with 

 several strong punctures. 



Legs: Anterior tibia with six stout spines dorsally. 



Sternites: Polished, minutely punctate on middle half, coarsely 

 rugopunctate on lateral fourth. 



Terminalia: Genital capsule punctate, more closely so laterally, 

 apical margin very wealdy sinuate medially; gonostylus as illustrated 

 (fig. 218). 



Length of body: 3.99(3.91-4.09). 



Female : Similar to male, measurements usually averaging larger. 



Head: Length-width ratio, 0.65(0.65-0.66) : 1.01 (1.00-1.04); inter- 

 ocular width, 0.68(0.66-0.70). Antennal segments: I, 0.21 (0.20-0.23) ; 

 II, 0.20(0.20-0.23); III, 0.25(0.23-0.26); IV, 0.32(0.30-0.33); V, 

 0.37(0.36-0.40). Labial segments: I, 0.28(0.27-0.30); II, 0.44(0.43- 

 0.46); III, 0.35(0.33-0.37); IV, 0.30(0.30-0.30). 



Pronotum: Length-width ratio: 1.18(1.10-1.23) :2.21(2.15-2.28). 



Scutellum: Length-width ratio, 1.52(1.49-1.56): 1.34(1.30-1.36). 



Length of body: 4.11(3.91-4.25). 



Type data. — M. uhleri was described by Signoret from "Amerique 

 du Nord." The type from the Signoret collection (Wien), was exam- 

 ined. It is labeled "Morrison, Geog. Am., 1877. I" and agrees with 

 the above treatment except that the contrast between the punctures 

 of the transverse impression and those laterally is slightly less than in 

 most specimens. 



Specimens studied. — 6 males, 34 females. 



United States: Alabama: Gadsden; May. Arkansas: Howard Co., Pike Co., 

 Washington Co.; February, May, September. Georgia: Morrison (type). Kan- 

 sas: Lawrence; July, Oklahoma: Grove; May. Tennessee: Hamilton Co., 

 Roane Co.; April, May. Texas: Benchley, Brownsville, Calvert, Columbus, 

 Denton, Devil's River, Gainesville, Kerrville; January, April, May, August. 



Discussion. — Signoret's statement that the terminal lobe of the 

 peritreme in this species is like that of the European Geotomus punc- 

 tulatus is erroneous. The lobe here is quite typical for the present 

 genus, being flat, with outline convex posteriorly, and with osteole 



