JAMES A. G. REHN 287 



more slender, hardly tapering. Genicular lobes of caudal femora 

 of longipenne sharply acuminate, lanceolate produced; of longi- 

 corne but moderately acute-angulate, not sharply produced. 

 Caudal tibiae of longipenne strongly expanded distad, markedly 

 lamellate and with the marginal fringe well developed; of longi- 

 corne much less expanded distad, but little lamellate and marginal 

 fringe very weak. Caudal tarsi of longipenne much elongate; of 

 longicorne shorter, both actually and proportionately. The col- 

 oration is of the same general type in both species. 



When the type of Cornops hivitiatum Scudder is compared with 

 the female of longicorne the two are seen to be very closely allied, 

 in fact much more closely than longicorne and longipenne. The 

 antennae of hivitiatum are somewhat longer than in longicorne, 

 the interspaces between the sternal lobes are broader, the ovi- 

 positor jaws are proportionately shorter and broader and the 

 caudal tibiae are slightlj^ more expanded and sublamellate distad, 

 although much less so than in longipenne. The coloration of 

 hivitiatum was, apparently, the same as that of longicorne, before 

 it was damaged by licjuid preservative. 



Copiocera prasina new species (Plate XV, figs. 39 and 40.) 



A striking new species of this interesting genus, differing from 

 all the other forms in the abdomen having no decided yellow, 

 red or orange lateral patches, in the caudal femora lacking the 

 distinctive dorsal yellow area found in the other species and in 

 the annulate cephalic femora and tibiae. It is nearer to laeta 

 Gerstaecker than any other species, but it also differs from that 

 in the slightly broader bocty, the broader eye, the practically 

 non-sulcate frontal costa, the narrower tegmina and in the less 

 infuscate periphery of the wings. 



Type. — 9 ; Para, State of Para, Brazil. (C. F. Baker.) [Acad. 

 Nat. Sci. Phila., Type no. 5285.] 



Size rather large: form as usual in the genus, less robust than in C. auslera, 

 not as slender as in laeta, very similar to C. erythrogastra; surface of face, lower 

 genae, pronotum and pleura finely cribroso-punctate. Head with the exposed 

 dorsal surface four-fifths as long as that of the pronotum : occiput very faintly 

 arcuate, not elevated dorsad of the pronotum, slightly declivent on the vertex, 

 the interocular width slightly exceeding the greatest width of the frontal costa; 

 fastigium slightly depressed below the level of the occiput, in form moderately 

 acute with the immediate apex blunted, a delicate medio-longitudinal sulcus 

 present: fastigio-facial angle, when seen from the lateral aspect, rounded 

 obtuse-angulate, face regularly and considerably retreating; frontal costa 



TRANS. AM. ENT. SOC, XLII. 



