OF WASHINGTON. 53 



Prof. O. F. Cook exhibited specimens of two new American 

 species of Japyx, one from Alabama, and the other from Ventura 

 County, California. He also showed a specimen of Casey's genus 

 Gastrotheus, originally described as a possible coleopterous larva, 

 although subsequently rightly referred to the Thysanura. Mr. 

 Cook finds it a genus of true Thysanura, distinct, however, from 

 recognized families by the presence of two pairs of several-jointed 

 abdominal legs, acting as supports to the abdomen. He thought 

 it necessary, in consequence, to admit at least a new sub-order, 

 which he would call Gastrotheoidea. The same speaker also ex 

 hibited two specimens of an African insect closely related to or 

 identical with Dyscritina Westwood. He also showed a speci 

 men of Walker's remarkable genus Hemimerus, collected in 

 Liberia, but not on a rat, the supposed habitat of the Hemi 

 merus. He also showed a specimen collected in Liberia, under 

 rotting wood, which will possibly form a new order of insects 

 of the Orthopterous series. He also showed a specimen of 

 Cryptostema Westwood, an African Arachnid now recognized 

 as the type of a distinct order originally based on a fossil genus 

 and now known by ThorelPs name of Meridogastra. Finally he 

 exhibited a small Arachnid collected under stones at Muhlenberg 

 Mission, Liberia. It has an i i-jointed abdomen, distinct by a 

 constriction from the cephalothorax, which has an evident trans 

 verse suture. The palpi are not chelate nor modified for pre 

 hension as in the Pedipalpi. The genus has been named 

 Artacarus and will probably constitute a family distinct from the 

 Schizonoticlae and also serve as the type of a distinct order of 

 Arachnida, which may be known as Artacarida, although this 

 name should not be supposed to carry an implication of especial 

 affinity with the mites. 



Mr. Johnson presented the following paper : 



NOTES ON THE MORELOS ORANGE FRUIT-WORM. 

 BY W. G. JOHNSON. 



The habits of the Morelos orange fruit-worm Trypeta ludens 

 Loew were first described by Dr. Rileyin August, 1888, in an 

 illustrated article in Insect Life (vol. I, pp. 45-47). He says: 

 "We have for some time been aware of the existence in Mexico 



