408 PROCEEDINGS OF THE NATIONAL MUSEUM vol. n« 



center but without a process; clypeal surface denticles almost indis- 

 tinguishable; mandibles with two separated, centrally located denti- 

 cles, the more apical one the smaller; antennae normal in form. 



Thorax black except for two small patches of brownish yellow on 

 the pronotum; tegulae not elevated, with many minute pits and a few 

 large pits ; enclosure surface with many minute pits and a few scattered 

 large pits in the lateral angles; mesosternal tubercle absent; legs black 

 except for small stripes on the tibiae and first tarsal segments of the 

 first ajd second pairs of legs; wings subhyaline with a more clouded 

 area along the anterior borders of the first pair. 



Abdomen black except for a band on the posterior border of the 

 third tergum, wide emarginate bands on terga 4 and 5, patches laterad 

 of the pygidium on tergum 6 and most of sternites 3, 4, and 5, all of 

 which are brownish yellow; pygidium semioval with the apical end 

 somewhat smaller. 



Male.^ — Length 9-10 mm. Black with brownish-yellow markings; 

 deeply and closely pitted; clothed with short silvery hairs. 



Head slightly wider than the thorax, black except for elongate, 

 narrow frontal eye patches; clypeal border slightly extended on the 

 medial lobe, ending in three distinct, subequal denticles; hair lobes of 

 the usual narrow type; mandibles without denticles; antennae largely 

 black, terminal segments slightly curved. 



Thorax black except for two irregular small patches on the prono- 

 tum; tegulae not elevated, with a few deep pits, between which are 

 many minute pits; enclosure with an indistinct central groove, a few 

 deep pits in the lateral angles and the general surface covered with 

 scattered minute pits; mesosternal tubercles absent; legs black except 

 for narrow stripes on the first two pair of tarsi; wings clouded along 

 the anterior area. 



Abdomen black except for the apical half of tergum 3, most of terga 

 4 to 7, and sternites 4 to 6, all of which are brownish yellow; pygidium 

 with sides slightly convex and apical end truncate. 



Types. — A neotype male of C. dilatata Spinola, designated by the 

 writer, is at the Instituto e Museo di Zoologia, University di Torino, 

 Italy. The male and a female, both apparently determined by Spi- 

 nola, are from Cayenne, French Guiana. A lectotype female of C. 

 maximiliani Saussure, from Mexico, designated by the writer, is at 

 the Museum Histoire Naturelle, Geneva, Switzerland. A lectotype 

 female of C. covtracta Taschenberg, from Brazil, designated by the 

 writer, is at the Zoologisches Institut, Martin-Luther-Universitat 

 Halle (Saale), Germany. The holotype female of C. olymponis 

 Strand, from Paraguay, is at the Zoologisches Museum, Humboldt 

 Universitat, Berlin. The type male of C. semiatra Banks, from Pati- 



