CYDNIDAE OF THE WESTERN HEMISPHERE — FROESCHNER 433 



Mesopleuron: Lateral area impunctate. 



Metapleuron: Terminal lobe of peritreme triangular posteriorly, 

 removed from straight lateral margin of evaporatorium by space 

 greater than width of terminal lobe (somewhat similar to fig. 97) ; 

 lateral area impunctate. 



Legs: Anterior tibia with five dorsal spines; posterior tibia weakly 

 sinuate subapically. 



Sternites: Alutaceous, with several coarse, shallow punctures in 

 spiracular area. 



Length of body: 5.36. 



Type data. — Type male (USNM) is from Cayamas, Cuba. 



Specimens studied: 



Cuba: Cayamas, April 3, E. A, Schwarz, 1 male (holotype, USNM); Sierra 

 Rangel, Aug. 28, 1929, J. Acuna and S. C. Bruner, 1 female (USNM). 



Melanaethus externus, new species 



Diagnosis. — Within the genus Melanaethus this species may be 

 recognized by the reduced, triangular terminal process of the peri- 

 treme, the presence of numerous, coarse punctures on head and side 

 of anterior pronotal lobe, and the lack of punctures on the anterior 

 convexity of the propleuron. 



Description. — Based on one female. Elongate-oval, widest pos- 

 terior to midlength. 



Head: Length about two-thirds width, 0.80 : L12 ; interocular width, 

 0.66; anterior outline a full semicircle, clypeus as long as juga, nar- 

 rowed apically; surface slightly convex, juga with numerous crowded 

 punctures, margin thick, with partial, submarginal dorsal carina; 

 ocelli small, separated from eye by space more than three times 

 transverse ocellar width; jugum ventrally and maxillary plate (except 

 posteriorly) shining, impunctate. Antennal segments: I, 0.26; II, 

 0.33; III, 0.34; IV, 0.41; V, missing. Bucculae about as high as 

 labial II, abruptly terminated posteriorly; labium reaching bases of 

 middle coxae. Labial segments: I, 0.40; II, 0.77; III, 0.49; IV, 0.40. 



Pronotum: Length about half of width, L26:2.40; anterior margin 

 deeply, doubly emarginate; lateral margin straight to faintly concave 

 on middle third, with submarginal row of five setigerous punctures; 

 transverse impression weak, postmedian, marked by irregular double 

 row of distinct punctures; anterior lobe with single row of distinct 

 punctures paralleling anterior emargination between eyes, and with 

 broad patch of them laterally; posterior lobe with few punctures scat- 

 tered medially and laterally. 



Scutellum: Longer than wide, 1.82:1.43; surface shining, with 

 irregularly scattered, strong punctures over surface except at base 

 and apex. 



501991 — 60 7 



