insects infesting Jigs. 33 



angustius parum transversurn, postice rotundatum. 

 Abdomen angustum, thoracis longitudine, apice geni- 

 talibus styluni gracilem formantibus, prope apicem 

 retinaculis duobus 4 dentatis (cercis apicalibus, Walker), 

 instructis. Pedes satis elongati et graciles, intermedii 

 parum minores, femoribus anticis paullo incrassatis ; 

 tibiis subdilatatis ; tarsis omnibus articulis 5 sat graci- 

 libus instructis. 



Typus Walkerella temeraria, n. s. (mas). (PI. IV., 

 figs. 9—12). 



(Sycobia bethyloides, "neuter? worker?," Walker, 

 op. cit., p. 62). 



Testacea lutea, mandibulis fulvis. Long. corp. 1 lin. 



Habitat in Fico Indica, Hindostan (Sir W. Elliott). In 

 Mus. Brit, et Hopeiano Oxoniae. 



This male insect, which Walker rashly described as 

 the neuter or worker of Sycobia bethyloides (unmindful of 

 the physiological considerations involved in the adoption 

 of such a term) differs from Sycobia in its apterous con- 

 dition, the structure and place of insertion of the an- 

 tennae, the want of maxillae and other inferior parts 

 of the mouth, and the structure of the parts of the 

 thorax. 



The shape of the head and the position of the an- 

 tennae, with the simple 5-jointed tarsi, will also dis- 

 tinguish this insect from any of the other apterous or 

 subapterous species subsequently to be described in this 

 memoir. 



Sycobiella, n. g. 



Characteres e mare descripti. Corpus minutum 

 apterum vel subapterum. Caput magnum, thorace latius 

 angulis anticis obliquis ; margine postico capitis in 

 medio emarginato et utrinque in angulum parvum pro- 

 ducto. Oculi laterales triangulares ; clypeus vel margo 

 anticus capitis emarginatus. Antennae sublaterales 

 prope marginem internum oculorum insertae, articulo 

 lmo maximo, piano, subquadrato, basi extus rotunclato, 

 intus profunde inciso ; 2ndo parvo obconico paullo cur- 

 vato, 3tio minuto annuliformi, 4to ad 8vum parvis sub- 

 aequalibus, singulo extus incisione parva subapicali 

 notato ; 9no ovali vix articulato. Mandibulae robustae 

 trigonae apice curvato bifido, parte supera apicis supra 



TRANS. ENT. SOC. 1883. PART I. (MARCH.) D 



