66 PROCEEDINGS OF THE NATIONAL MUSEUM vol. i04 



did not designate type specimens). The coarsely punctate dark head 

 and the excavation on the abdomen of the male are the distinguishing 

 characters of the species. A number of specimens of this species are 

 in the Bowditch collection identified by Jacoby as D. conjuncta 

 (Germar). The ones that he described as D. tristis have darker 

 elytra, the pale vittae being a little narrower. I cannot find any 

 essential difli'erence otherwise. The aedeagi are the same. 



Padre Pio Buck writes, "Many of the Disonycha conjuncta (Germar) 

 I collected on Pennisetum purpureum Schumacher (here commonly 

 named 'Elephant grass'), but it is also found on other Graminaceae." 



Disonycha prolixa Harold 



Figure 75 

 Disonycha prolixa Harold, Coleopterologische Hefte, vol. 14, p. 105, 1875. 



From 5.5 to 6.5 mm. in length, oblong oval, shining, mirror smooth; 

 pale yellow; broad black spot on occiput, dark mouthparts; wide 

 median and two large lateral spots on prothorax; on elytra a wide 

 sutural vitta uniting at apex with a narrower marginal one, median 

 vitta wide; body beneath pale, the legs, except coxae, black. 



Head smooth except for a circle of punctures about fovea near eye, 

 extending to the rear of eye, interocular space about half width of 

 head, frontal tubercles not marked, a narrow carina between antennal 

 sockets extending to labrum, head pale with a darkening about eyes 

 and a broad occipital spot, the mouthparts dark. Antennae dark 

 with the three basal joints pale edged. Prothorax a little more than 

 twice as broad as long, surface somewhat convex, without distinct 

 depression along base, surface mirror smooth, pale with a broad dark 

 irregularly shaped median spot and two large lateral spots. Elytra 

 miiTor smooth, pale, with a broad dark sutural and marginal vitta 

 united at apex and a wide median vitta. Epipleura dark. Body 

 beneath pale, shining, lightly pubescent, coxae pale, rest of legs dark 

 and shining. Length 5.5 to 6.5 mm., width 2.8 to 3.3 mm. 



Type: Collected at Cordoba, Argentina, possibly at the Natural 

 History Museum, Stettin, Germany. 



Other localities: Argentina: La Vina, Salta, Monros; Campo 

 Gallo, Santiago del Estero, Monr6s; San Pablo, Famailla, Tucumdn, 

 Mom'6s; Frias, Santiago del Estero, H. L. Parker; La Rioja Patquia, 

 K. J. Hay ward; Salta, H. L. Parker. Paraguay: Asuncion, E. G. 

 Kent; Sapucai, W. T. Foster; San Salvador, Dr. Bohls. Bolivia: 

 Cochabamba, Germain; Rurrenabaque and Rio Beni, W. M. Mann; 

 Trinidad, Kusche. Brazil: Sao Paulo, A. A. Barbiellini; Campinas, 

 H, L. Parker; Serro Azul, Padre Pio Buck. 



