93 Psyche [June 



Fig. 5. Posterior (ventral) view of the paragnaths of the crustacean 

 Apseudes. 



Fig. 6. Posterior (venti-al) view erf a paragnath and maxillula of the crus- 

 tacean Squilla. 



Fig. 7. Anterior (dorsal) view of a paragnath and maxillula of the crus- 

 tacean Apus, bent over backward to show attachment to the basal lamina. 



Fig. 8. Ventral (posterior) view of a paragnath and the lingua of the 

 insect Machilis. 



Fig. 9. Same view of a paragnath of Machilis taken from a drawing by 

 Carpenter. 



Fig. 10. Anterior view of metastonia of the trilobite Triarthrus from a 

 diawing bj' Raymond. 



Abbreviations, 

 a, Lobule of paragnath; at, Portion of basal segment of trilobitan limb 

 liomologized with second antenna; b, Lobule of paragnath; bl, basilamina, or 

 basal lamina which bears the paragnath and maxillula; bp, Basiparagnath, 

 or basal portion of paragnath; c, Epiparagnath, or appendage of paragnath; 

 dp, Distiparagnath, or distal portion of paragnath; li, Lingua; II, Lingua- 

 lora, or lora of lingua; md. Mandibles; mts, Meta-stoma of trilobite; mx, 

 First maxilla, or maxillula; mxs, Sternum of first maxillary segment; 

 pg, Paragnaths, "superlinguse", or "paragossse"'; pc, Pharyngocrista, or 

 median pharyngeal ridge; tc, Trophicostae, or rib-like structu"e at bases of 

 trophi. 



PEOCEEDIXGS OF THE CAMBRIDGE ENTOMOLOGICAL 



CLUB. 



At the meeting of February 8, Prof. W. j\I. Wheeler described 

 Ihe nesting habits of some ants of the genus Careham, found in 

 Soutli America. These live in nests of Termites, making their own 

 Inirrows between those of their hosts and feeding on the young 

 of the latter. The various forms of these ants had been obtained 

 from the stomachs of Anteaters killed near their nests. The males 

 and females Avere of large size and the workers extremely small. 

 AA'lien the males and females leave the nest for the mating flights 

 some of these minute workers cling to their hairs, and when the 

 females start new colonies these workers bring in food and feed 

 the first-hatched young, which the female herself is unable to do. 



Another genus of ants of small size, Alio merits, lives partly in 

 the swoollen branches of certain plants, going up and down between 

 the plant and the underground nest in earth-covered galleries 

 attached to the hairs of the plant. 



Prof. C. T. Brues described some guests of Ants and Termites 

 from South America. Wingless flies of the family Phoridfe li^•e 

 in the nests of some ants and even travel with them iu their raids 

 outside the nest. In some termite nests are minute hymenopter- 



