604 PROCEEDINGS OP THE NATIONAL ML'SEVM. you 57. 



prothorax anteriorly and medianly burnt sienna, posteriorly Roman 

 sepia, meso and metathoracic dorsal plates Roman sepia, basal plate 

 of cerci burnt sienna with four longitudinal lines of sepia, cerci 

 burnt sienna; delicately chitinous parts pale brown; membranous 

 parts purplish. Mandible more robust, not so pointed as in the 

 above-described different species of Enoclenis; length to width as 

 8^ : 6 : apex right above basis ; retinaculum at the middle of the man- 

 dibular inner margin; in front of retinaculum with a low, blunt, 

 diminutive tooth. Basal plate of cerci about as long as fron-^. Cerci 

 nearly as long as basal plate, diverging from each other about 50° ; 

 distally subcylindrical ; on inner and lower side sw^ollen like a heel; 

 apex short, dentiform, abruptly contracted. 



ENOCLERUS MUTTKOWSKII Wolcott. 



Hopkins U. S. No. 11847«; mature. Species reared ; cast skin and imago preserved. 



(Figs. 18, 51, 68, 85.) 



Total length of body, about 11 mm. General shape as in E. ichneu- 

 iiioneus; sculpture of frons, epicranium, and other chitinous parts 

 more prominent than in the foregoing species. Color of corneous 

 parts sepia; delicately chitinizecl parts pale yellowish; membranous 

 parts dorsally bluish gi'een, ventrally lavendar to cobalt blue. Man- 

 dibles of same, comparatively blunt type as in E. rosmm^is: apex 

 situated just above inner angle of base; retinaculum a trifle closer 

 to the tip than to the base of mandible ; margin between retinaculum 

 and apex entire. Basal plate of cerci about as long as frons. Cerci 

 about same length as basal plate, parallel, subcylindrical, distally 

 spherically swollen: apex short, abruptly contracted, dentiform, 

 somewhat inwardly nnd a trifle forAvardly curved. 



3. Genus represented by ENOCLERUS SPHEGEUS Fabricius. 



The larvae of the present form which, according to the adult, is 

 considered a mere species of the genus Erwclerus^ is so deviating in 

 several characters from the above-mentioned larvae of this genus that 

 it must be treated as a separate genus. 



Membranous parts almost unicolored. Setae well developed, 

 numerous, scattered. Head with nearly parallel sides, rather flat; 

 proportion between thickness and length of head as 10 : 14. Corneous 

 parts heavier than in any of the formerly mentioned forms; this 

 especially applies to the chitin of the headcapsule. Frons with un- 

 equal surface. Epicranium dorsally and adjacent to the median 

 part of frontal suture with a conspicuous, rounded protuberance, 

 which is more than half as large as the mandible. Ocelli arranged 

 as in genus 2, except that the anterior and posterior rows are straight 

 parallel. Antenna with length of basal, second and apical joints 

 about as 3 : 1 : 1 ; together the joints are more than half as long as the 



