VITTATE CHRYSOMELID BEETLES DISONYCHA — BLAKE 65 



of the three basal joints. Prothorax twice as wide as long, moderately 

 convex and at base a little depressed above the scutellum and on the 

 sides, surface alutaceoiis and finely punctate, pale with five dark 

 spots often confluent in ]5art at least and often forming an irregular 

 fascia across pronotum. Elytra alutaceous and with very fine 

 punctures, faintly shining, a broad dark sutural vitta uniting at apex 

 with a narrow marginal vitta, and a broad median vitta, sometimes 

 the median vitta coalescing with the sutural in places, leaving only 

 an interrupted pale line joined at the apex with a similarly thin pale 

 submarginal line (these dark specimens appearing nearly black on the 

 elytra), epipleura dark. Body beneath and legs entirely dark except 

 for the border of the prosternum and a narrow area between the front 

 coxae, alutaceous, only faintly shining under the short fine pubescence, 

 abdomen of the male unusual in having a broad rounded excavation 

 near the apex with a tiny knob in the middle of the apical side. Length 

 6.5 to 7.4 mm., width 3.4 to 3.8 mm. 



Type and paratypes: In Zoologisches Museum, Humboldt- 

 Universitat, Berlin; t^^pe locality given by Germar as Buenos Aires, 

 Argentina. 



Other localities: Argentina: Veronica, Buenos Aires; La Plata, 

 Spegazzina; Tucumdn. Brazil: Corupd (Hansa Humboldt), Santa 

 Catarina, A. Mailer; Porto Alegre, Pareci Novo, vSerro Azul, Itap- 

 irango, Padre Pio Buck; Rio Grande do Sul. Uruguay: Montevideo. 

 Paraguay: no other locality for Jacoby (2nd collection) specimen in 

 MCZ (Bowditch collection) ; Puerto Pinasco, "Podtiaguin." 



Remarks: Dr. K. Dclkeskamp of the Zoologiches Museum, Hum- 

 boldt-Universitat sent me what he considered the type of Germar's 

 Haltica conjuncta together with two paratypes. The specimen with 

 the type label bears on the label "conjuncta Germ." and the locality 

 "Bras." It is a female with a spotted, not banded pronotum. The 

 two paratypes have no locality labels. One of them, also a female, 

 has a wide dark fascia across the pronotum. The other, a male, with 

 the usual round excavation near the tip of the abdomen, has a spotted 

 pronotum. Otherwise the three specimens are similarly colored. 

 Whether these are really Germar's specimens is not certain to me. 

 His original description gave the habitat as Buenos Aires. In the 

 U. S. National Museum are^specimens from Buenos Aires similar to 

 these, and also examples from Paraguay of another species, with more 

 coarsely and densely punctate elytra, that correspond fairly well to 

 Germar's description. 



Jacob\^ described D. tristis from Brazil, and I have examined two 

 cotypes in the Bowditch collection at the Museum of Comparative 

 Zoology. These are the same species as Germar's. Presumably 

 other specimens of the type series are in the British Museum (Jacob}^ 



