604 PROCEEDINGS OF THE NATIONAL MUSEUM vol. m 



of ventral margin of femur, and spines on posteroventral margin of 

 tibia arising ventrally from prominent tubercles. 



Tcrminalia: Apex of genital capsule prolonged, weakly emarginate, 

 surface with scattered fine punctures; gonostylus as illustrated (fig. 

 272). 



Length of body: 11.97. 



Type data. — Described from holotype male in the collection of 

 J. C. Lutz labeled "Nova Teutonia, Santa Catarina, Brazil, xii-24, 

 1950, F. Plaumann." 



Discussion. — The numerous, strong, unique modifications on the 

 single specimen leaves no room for doubt concerning its validity as a 

 new species. The trivial name alludes to the peculiar dilation of the 

 anterior tibiae. 



Dallasiellus (,Dallasiellus) fusus, new species 



Plate figure 273 



Diagnosis. — The fusing of the apex of the peritreme to the sur- 

 rounding cuticula permits ready recognition of this species within the 

 subgenus. 



Description. — Male: Four specimens. Oval, widest near mid- 

 length. 



Head: Length about two-thirds width, 0.99(0.90-1.03): 1.47(1.36- 

 1.53); interocular width, 0.91(0.90-0.93); anterior outhne a somewhat 

 truncated semicircle, juga longer than and contiguous in front of 

 clypeus; surface finely alutaceous, impunctate only in and imme- 

 diatel}^ anterior to interocellar area, remainder of surface with numer- 

 ous fine punctures and distinct, radiating rugae; jugum with sub- 

 marginal row of close-set setigerous punctures extending little more 

 than three-fourths of way to apex; ocelli small, separated from eye 

 by space about three times ocellar width; jugum ventrally and 

 maxillary plate, except basally, shining, impunctate. Antennal seg- 

 ments: I, 0.31(0.30-0.33); II, 0.33(0.33-0.33); III, 0.38(0.36-0.43); 

 IV, 0.46(0.43-0.49); V, 0.51(0.50-0.53). Bucculae higher than labial 

 II, evanescent posteriorly; labium attaining mesosternum or bases of 

 middle coxae. Labial segments: I, 0.44(0.43-0.44); II, 0.77(0.69- 

 0.83); III, 0.54 (0.52-0.58); IV, 0.41(0.38-0.46). 



Pronotum: Length more than half width, 1.76(1.62-1.95) :3.22 

 (3.06-3.39); anterior margin moderately, singly emarginate; lateral 

 margin entire, straight on basal third, with seven to eleven setigerous 

 punctures submarginally ; transverse impression almost wholly absent, 

 marked by iiTegular band of widely separated punctures; anterior lobe 

 with numerous punctures laterally and few subapically, elsewhere with 

 scattered minute punctures; posterior lobe with several punctures 

 medially and laterally. 



