CYDNIDAE OF THE WESTERN HEMISPHERE FROESCHNER 609 



Propleuron: Weakly alutaceous, punctured only in depression; 

 prosternal carinae very low, sharp. 



Mesopleuron: Evaporatorium reaching lateral margin along pos- 

 terior edge of segment, interrupted near posterior margin of segment 

 by pohshed band (fig. 108); lateral area impunctate. 



Metapleuron: Evaporatorium with outer edge weakly concave; 

 lateral area impunctate. 



Sternites: Weakly alutaceous, with scattered punctures and short, 

 longitudinal rugae on lateral third. 



Legs: Moderately long. 



Terminaha: Genital capsule entire apically, surface finely punctate 

 in lateral impressed areas; gonost3dus as illustrated (fig. 275). 



Length of body: 10.27. 



Female: Very similar to male but with exocorium and mesocorium 

 more sparsely punctate medially. 



Head: Length-width ratio, 1.51:2.29; interocular width, 1.30. 

 Antennal segments: I, 0.43; II, 0.66; III, 0.63; IV, 0.86; V, 0.94. 

 Labial segments: I, 0.95; II, 1.46; III, 1.46; IV, 0.96. 



Pronotum: Length-width ratio, 2.70:5.21. 



Scutellum: Length-width ratio, 3.61:3.24. 



Length of body: 10.30. 



Type data.— Holotype male (Wien), "Unt. Amaz. Taperinha b. 

 Santarem, 1-10, VI, '27, Zerny." Allotype female (Carv), "Paranha, 

 Est. do Par^, 6-1-1920, coll. Doris Mender." Paratypes, 2 females, 

 as follows: 



Brazil: Santardm, 1 female (Cam). 



Argentina: Guadalupe, Santa Fe, Nov. 27, 1939, Biraben-Bezzi, 1 female 

 (UnivNac). 



Discussion. — The shape of the mesopleural evaporatorium is very 

 suggestive of the condition found in the subgenus Pseudopangaeus, 

 but differs in that the extreme posterior part extends thinly to lateral 

 margin of the segment (fig. 108), thus allying this species to subgenus 

 Dallasiellus. It also dift'ers from Pseudopaiigaeus in having only 

 fine crenulations on the posterior margin of the mesopleuron, in not 

 having the lateral margin of the matapleural evaporatorium deeply 

 concave, and in having the posterior tibia of the male simple. 



Dallasiellus (Dallasiellus) levipennis (Signoret), now combination 



Plate figure 27 



Geolomus levipennis Signoret, 1883, p. 35, pi. 2, fig. 144. 

 Geocneihus prosternalis Horvjith, 1919, p. 246. New synonymy. 



Diagnosis.— This species is characterized by its complete, uninter- 

 rupted mesopleural evaporatorium and lobulate prosternal carinae 

 (fig. 27), which are as high or higher than labial II. 



