146 APPENDIX. HYDfiOMETRID,!. 



margins, and a central discal elongate spot to pronotum black ; 

 antennae black ; rostrum ochraceous with its apex black ; hem- 

 elytra black, the marginal and apical areas more brownish ; body 

 beneath ochraceous, a spot on the posterior acetabular area black ; 

 legs black, anterior femora much longitudinally streaked with 

 ochraceous ; structural characters as in generic diagnosis. 



Length 8 millim. 



Hob. Travancore; Maddathoray, W. base of "Western Ghats 

 (Annandale). 



The above description is taken from a macropterous female 

 specimen ; in a second male apterous example, which measures 

 7 mm., the pronotum has a continuous broad central longitudinal 

 fascia, not extending to the anterior area or lobe. 



2920. Jucundus burmanus, List. A. M. N. H. (8) v, p. 143 (1910). 



Apterous form. Body and legs ochraceous, the intermediate and 

 posterior tibiae piceous ; eyes and a narrow central longitudinal 

 line to pronotum black or piceous ; abdominal segments piceous ; 

 legs with narrow black or piceous longitudinal lines ; antennae 

 black, with the basal joint very long and somewhat stout, second 

 joint less than one-third the length of first joint, remaining joints 

 mutilated in type ; anterior area or lobe of pronotum longer than 

 in J. custodiendus and with a distinct central longitudinal black 

 line ; abdomen with six segments visible above in addition to the 

 anal segment, which is ochraceous with a transverse black line ; 

 rostrum scarcely passing the anterior coxae ; anterior tibiae den- 

 tately widened at apex. 



Length 6| millim. 



Hob. Upper Burma ; North Shan Hills (J. C. Brown}. 



Two apterous forms received from Burma, by the structure of 

 the head undoubtedly belong to Jucundus. They differ from the 

 type J. custodiendus in having the antennae more robust, the 

 anterior pronotal area or lobe a little longer, and by the anterior 

 tibiae being more robust and dentately ampliate at apex. 



Genus ONYCHOTRECHUS. (Vol. II. p. 182.) 



2921. Onychotrechus vadda, Dist. A. M. N. H. (8) v, p. 144 (1910). 



c? . Body above black ; head with the lateral margins in front 

 of eyes, and a central longitudinal fascia, ochraceous ; antennae 

 piceous, basal joint paler beneath ; pronotum with the anterior 

 margin, lateral margins, and three longitudinal discal fasciae (the 

 central one straight, the lateral ones moderately curved) ochraceous ; 

 mesonotum with a narrow central straight longitudinal fascia, on 

 each side of which is a broader angulate fascia, and a posteriorly 

 attenuated lateral fascia, ochraceous ; at base of abdomen a curved 

 oblique fascia on each side, and a series of lateral marginal 



