BY EDWARD NEWMAN. 397 



brevior, in 2 magnos lobos divisa : prothorax fere sphaeroides, 

 capitem recipiens : abdomen fere petiolatum ut in Hymenopteris 

 aculeatis : elytra ad basin vix corpore angustiora, sed mox con- 

 stricta, angustissima, linearia apice divaricata : metalae amplse, 

 baud elytris tectae : pedes mediocres, femoribus baud clavatis. 

 Generi Mulorcho certe afSnis. 



Sphe. chalybea. Chalyheo-nigra ; mitennce, articulo 5^°.ferru- 

 gineo excepto, fuscce; elytrorum, plaga Jmmerali altera que 

 dorsali albidis. (Corp. long. 1 unc. ; metalar. dilat. 2 unc.) 



Antennae brown, with the fifth joint ferruginous: head and prothorax 

 black : abdomen black, with a beautiful steel-blue tinge : elytra 

 black, tinged with blue, and having two whitish spots on each ; the 

 smaller on the shoulder, the larger, of irregular shape, on the disk 

 near the base : hind wings ample, blue black, iridescent : femora 

 blue black, the hind ones having an elongate ferruginous mark on 

 the inner side near the apex : the hind tibiae are externally black, 

 internally ferruginous ; the other tibiae and the tarsi are brown. 



Inhabits Brazil. 



Genus. — Collapteryx, Newman. 



Caput pronum, prothorace angustius, clypei margo concava: antennae 

 breves, dimidio corporis paullo longiores, ll-articulatae, articulus 

 1"'. elongatus, 2"S brevissimus, 3"% elongatus sed 1°. brevior, extus 

 paullo incrassatus, 4"^ et cseteri pedetentim longitudine decres- 

 centes, fere lineares ; instrumenta cibaria fere Dorcadionis : pro- 

 thorax capitem recipiens, lateribus convexis, pone medium 

 unidentatis : elytra ad suturam conjuncta, lateribus convexis, 

 abdominis apicem baud tegentia, pedes breves, femora vix in- 

 crassata. 



Coll. Blapsides. Atra, glabra; caput, prothorax, elytrorum 

 discus et latera prave punctata; elytrorum, apices Iceves. 

 (Corp. long. 1 unc. ; lat. '425 unc.) 



Black, glabrous ; the first joint of the antennae covered with shallow 

 impressions ; the face, crown, and prothorax with irregularly 

 scattered but deep punctures ; the disk and sides of the elytra, 

 the latter more particularly, are covered with large and deep 

 punctures ; the apex of the elytra is smooth : the elytra are 

 united at the suture, and the extremity of the abdomen is un- 

 covered. This insect has the habit of Blaps, 



