70 PROCEEDINGS OF THE NATIONAL MUSEUM vol. i04 



Antennae with the three basal joints pale edged, remainder except 

 brownish apical joint deep piceous. Prothorax more than twice as 

 broad as long, with wide anterior angles and nearly straight sides, disc 

 rather flat and depressed at base, surface mirror smooth, pale yellow 

 with seven small deep brown spots. Elytra with a broad dark com- 

 mon sutural vitta uniting at apex with a lateral marginal vitta, a very 

 wide median vitta; surface mirror smooth, epipleura dark. Body 

 beneath entirely pale, lightly pubescent, coxae pale, femora shiny and 

 dark above with pale under surface, tibiae dark, the hind ones with a 

 pale streak, tarsi dark. Length 5.3 to 6.4 mm., width 2.6 to 3 mm. 



Type: Male, and four paratypes, USNM 61831, taken at Huache 

 and Rurrenabaque, Rio Beni, Bolivia, W. M. Mann, September, 

 Mulford Biological Expedition 1921-22; one paratype in MCZ. 



Other localities: Paraguay: Sapucai, W. T. Foster, 6 specimens. 

 Brazil: near Campinas, Sao Paulo, P. A. Berry, 1939, 1 specimen; 

 Caviuna, Parana, A. Mailer, January 1946, AMNH (1). Argentina: 

 Tablillas, Salta, G. L. Harrington, CAS (2); Urundel, Salta, Monros, 

 1 specimen; Tablillas, Salta, Dr. Oran, 2 specimens; Alto Parana, 

 Misiones. 



Remarks: The short broad prothorax with its seven small dark 

 spots is sufficient to identify this species. Some of the Brazilian 

 specimens have femora that are dark only towards the apex and in 

 all, the tibiae have paler streaks, but the aedeagus is like those from 

 Bolivia. 



Disonycha argentinensis Jacoby 



Figure 72 



Disonycha argentinensis Jacoby, Entomologist, vol. 34, p. 147, 1901. 



Between 5 and 6 mm. in length, elongate oblong, moderately shin- 

 ing, head and pronotum densely and coarsely punctate, elytra usually 

 more finely punctate; head entnely dark; prothorax pale; elytra with 

 a broad dark sutural vitta joming with the lateral-marginal one at 

 apex (in the Brazil specimens the median dark vitta completely united 

 with the lateral-marginal, but in the Argentine specimens these not 

 joined or only partly joined) ; breast dark, legs bicolored. 



Head entirely dark and shiny, coarsely and rugosely punctate, with 

 tubercles smooth, carina somewhat produced, interocular space more 

 than half width of head. Antennae of moderate length, dark with 

 the three basal joints pale edged and the apical joint often paler brown. 

 Prothorax barely twice as wide as long with rounded sides, not very 

 convex, depressed over the scutellum, entirely pale, coarsely and 

 densely punctate and also alutaceous. Elytra usually more finely 

 punctate, the punctation denser and coarser below the scutellum but 

 in the Bolivian specimen the elytra coarsely punctate throughout, the 



