130 



Cockerell — Insects in Burmese Amber. 



of beak 370 ; second antennal joint 496, third 352, fourth 368 ; 

 base of anterior legs to base of antenna' about 800 ; length of 

 anterior wing about 2080. This agrees with the type of the 

 genus (JS. flavicollis Westw.) in the closed discal cell and single 

 claw on anterior legs. The venation is more complex than in 

 the living species of which I have any information, and is 

 therefore apparently more primitive. Possibly a distinct genus 

 is indicated, but existing species differ greatly in venation, 

 which also appears to vary a good deal within the species. 

 The second vein from the stigma is rather weak, and appears 



Fig. 1. 



Fig. 1. Enicocephalus fossilis. A, anterior tibia, tarsus and claw; B, 

 antenna ; C, end of wing. 



to represent a cross-vein proper. The closed quadrate" cell 

 below the discal cell appears to be a primitive character; it is 

 found in Scytinopiera from the Permian, one of the Palaeo- 

 hemiptera. The species of Enicocephalus swarm in the air 

 like gnats, so it is easy to see how they might be trapped in 

 the resin forming amber. Handlirsch records no fossil species, 

 but when Westwood originally described the genus in 1837 he 

 included four species, of which two were from "gum anime," 

 which I suppose to be copal, of postertiary age. Ashmead 

 remarked in 18y2 : "The genus is evidently an ancient phylo- 

 genetic type, now nearly extinct." The few living species are 

 widely scattered over the world. 



Psyllipsocus (?) banksi n. sp. (Psocidse). 



Black, with dark brown legs ; wings ample, broad, extending 

 far beyond abdomen, hyaline, spotless, without scales, the veins 

 not hairy. Antennas very long, and (except the base) ex- 

 cessively slender, thread-like. Anterior tarsi three- jointed, the 

 first joint considerably longer than the other two combined, 

 and having a row of short oblique bristles on its lower side. 

 Hind tibiae and tarsi very long and slender. Head large ; 



