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MUSEO NACIONAL DE H. NATURAL DE BUENOS AIRES 



2. Thoracis dorso plus minusve rufo Cohors II. 



— Thoracis dorso nigro aut fere nigro rubedine defi- 

 ciente 3. 



3. Thorax maculis ve! fasciis tegumentariis in dorso 

 pallidis (plus minusve albis, flavis), interdum in 



pronoto tantum ornatus 4. 



— Thorax in dorso maculis tegumentariis pallidis des- 

 titutus. Abdomen fasciis tegumentariis pallidis in 



dorso ornatum vel destitutum 7. 



4. Abdomen fasciis tegumentariis dorsalibus pallidis, in- 

 tegris, id est: in medio liaud interruptis (etiam si fas- 



cia sola) ornatum (vide tamen Ps. laticeps S) Coliors III. 



-^Abdomen fasciis tegumentariis dorsalibus pallidis 

 deficientibus, vel omnino haud integris, aut ómni- 

 bus interruptis 5. 



5. Eisdem fasciis pallidis in medio interruptis (interdum 



rare tamen Ps. rufipes ^ fascia in 5" integra vel vix). Cohors IV. 



— Integris atque interruptis intermixtis, aut deficientibus. 6. 



6. Integris atque interruptis intermixtis Cohors V. 



— Deficientibus Cohors VI. 



7. Fasciis integris et interruptis Cohors Vil. 



— Integris aut interruptis, aut deficientibus 8. 



8. Interruptis Cohors VIII. 



— Integris aut deficientibus 9. 



9. Integris Cohors IX. 



— Deficientibus x Cohors X. 



IV. SPECIERUM SYNOPSES ATQUE DESCRIPTIONES. 



COHORS I. 

 Abdomen in dorso rufum aut rufescens omnino vel ad partim. 



1. Abdominis segmentis maculis vel fasciis tegu- 

 mentariis pallidis destitutis 2. 



— Fasciaeet maculas adsunt; abdominis basis quan- 

 doque plus minusve rufa et aequo modo om- 

 nino vel ad partim pedes, aut nigri 4. 



2. o- Abdomen rufescens; faciei pars infera flava. — 



Long. 5 I mm \. S-Ps. nigrínasis. 



— Abdomen ad partim rufescens 3. 



