170 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxxiii. 



DyscTitlna. The matter provoked much discussion at the time, and 

 the rearing of the adult insects hy Green detinitely settled the ques- 

 tion of the affinities of Westwood's genus, showing it to be Forhculid 

 and congeneric with Diplatys. These specimens from Guatemala are, 

 so far as I can learn, the first examples of this ancestral t3'pe of forfi- 

 culid larvi« ever reported from the New World. The adult form, 

 however, is not at all rare in certain places. 



D. i<eve7\i^ which was described from a single female specimen, is a 

 good species, but is very varial)le in coloration. The series before 

 me comprises one with the color almost entirely black, some with 

 the base of the abdomen and the forceps, or only the l)ase of the abdo- 

 men, reddish, and some with the apical part of the abdomen and the 

 forceps, or only the forceps, red. The pr<^notum is usuall}^ unicol- 

 orous, sometimes margined with lighter color, as in the type, and the 

 elytra of the specimens before me are uniformly black. The pro- 

 jecting portion of the wings is usually, but not always, darker on the 

 apical portion than basal ly. The legs are sometimes wholly black, and 

 sometimes the middle and posterior femora are basally j^ellowish. 



"Several specimens, including long-taileil larvre. l)eaten from dead banana leaves 

 that hang on the growing plant." 



CYLINDROGASTER DIPLATYOIDES, new species. 



One female. Cacao, Trece Aguas, Alta Vera Paz, April 11. 



Description. — Head slightly broader than the pronotum; color shiny 

 black above, below and about the mouth parts brownish; antenniB 

 imperfect, clear reddish yellow in color, the long basal and very short 

 second segments darker. Pronotum shining black above, lighter 

 below, longitudinally broadly sulcate above, the disk anteriorly con- 

 vex, posteriorly flattened; the whole pronotum is distinct!}" narrowed 

 and neck-like in nearly the anterior half, the posterior portion parallel 

 sided, truncate behind, the entire disk less than twice as long as the 

 mesiam width. El}' tra piceous, not quite twice as long as the prono- 

 tum and together almost twice as broad as the pronotum, posteriorly 

 subtruncate. Scutellum showing between the bases of the elytra, 

 small but distinct; projecting portions of the wings a little less than 

 one-half the length of the elytra and of the same color and texture, 

 but narrower. Abdomen narrowing basallj-, reddish 3"ellow above 

 and below, somewhat infuscated laterally above on the basal third; 

 there are inconspicuous lateral folds near the base of the abdomen, and 

 the last segment is very large and subquadrate. Legs clear reddish 

 3"ellow, without distinct infuscation. Forceps somewhat longer than 

 the pronotum, moderately stout, and separated basally by a space 

 nearly as great as the width of one of them at that point, parallel 

 sided in the basal half, then narrowing in two terraces to a point; 

 unarmed, the tip considerably incurved. 



