THE CANADIAN ENTOMOLOGIST 381 



single genus Zorotypus containing three species, guineensis from 

 Africa, ceylonicus from Ceylon and javanicus from Java. Excellent 

 figures showing the general appearance and details of these in- 

 teresting insects are given by the describer. Later* the same 

 writer described a new species from the New World, Z. neotropicus 

 from Costa Rica. Melander and Brues, Key to the Families of 

 North American Insects, Plate 2, Fig. 26, copy one of Silvestri's 

 figures showing the general appearance of Zorotypus. 



Silvestri compares the Zoraptera with the Isoptera and with 

 the Blattidae and mentions the Dermaptera in this relation, but 

 did not seem to consider any possible relationship with the Psocidse. 

 Thus it seems somewhat odd that they should have been con- 

 sidered psocids by Mr. Hubbard and others. The rapidity of 

 movement was probably responsible, as structurally little simi- 

 larity to Corrodentia seems to exist. The presence of cerci, the 

 situation of the antennae near the base of the mandibles and espe- 

 cially the general appearance show a wide divergence from the 

 psocid type but a near relationship to termites. 



NEW NEARCTIC CRANE-FLIES (TIPULID^, DIPTERA). 



PART VI. 



BY CHARLES P. ALEXANDER, LAWRENCE, KANS. 



Dicranotnyia rhipidioides, new species. 



Antennae black, moniliform ; general coloration brownish 

 yellow, the prsescutum with three dark brown stripes; wings 

 grayish with sparse brown spots and subhyaline drops; Sc short, 

 cell 1st M^ closed, elongate. 



Male. — Length about 5.2 mm.; wing 6.9 mm. 



Rostrum and palpi dark brown. Antennae black, the flagellar 

 segments moniliform, subglobular. Head dark. 



Thorax pale brownish yellow, the praescutum with three dark 

 brown stripes, of which the median stripe is very broad, the lateral 

 stripes narrow, continued backward so as to suffuse the scutal 

 lobes; postnotum darker. Pleura light yellowish brown. Halteres 



*Id, vol. X, p. 120 (1916.) 



November, 1918 



