HYMENOBOSMINA. 439 



distinct and entire. Scutellura not strongly convex, slightly 

 longer than broad, with its apex obtuse and usually distinctly 

 margined. Basal abdominal segment slender, elongate and 

 carinate beneath, with its spiracles behind the centre ; terebm 

 shortly exserted. Tarsal claws with stout and stiff bristles. 

 Wings with no areolet. 



Range. India, Ceylon. 



In both the typical species of this genus, and in the type of 

 H. pilosella the metathoracic spiracles are elongate. 



Cameron says (Zoo. 0&.)thftt this genus " comes near to Charops, 

 with which it agrees in wanting the areolet, but that genus 

 may be known from, it by the eyes being deeply emarginate, the 

 scutellum depressed and the antennae scarcely half the length of 

 the body. Apart from the absence of the areolet it comes near to 

 Campoplex, which may be known from it by the much larger and 

 more elongated spiracles. The spiracles are more oval than in 

 Limneria, and the median segment [metathorax] has the areas 

 more numerous and more distinct." It is very closely allied to 

 Cliarops, but the head is much broader posteriorly. 



The above description he supplements in 1903 (Zeits. Hym.- 

 Dipt. iii, p. 338) by a more detailed account of the venation, &c. : 

 Face and the apically rounded clypeus deplanate ; cheeks as long 

 as the scape ; postpetiole very distinct from the petiole ; basal 

 nervure continuous through the median ; hind wings with the 

 apical nervures entirely wanting and with but two entire cells, a 

 longer superior one extending to a little beyond the centre of the 

 wing, and a shorter inferior one less than halt' the length of the 

 upper. 



Table of Species. 



1 (4) Frona centrally carinate ; scape entirely 



red. 



2 (3) Flagellum entirely black ; legs without 



black markings spimpes, Cam., p. 439. 



3 (2) Flagellum basally pale : hind legs with 



black markings / trichoptilus, Cam., 



4 (1) Frons not carinate ; scape tiavidous only [p. 440. 



beneath. 

 > (6) Areola not basally acuminate ; hind 



femora black . . . .' , pilosella, Cam., p. 441. 



(5) Areola basally acuminate ; hind femora 



testaceous mandibularis, Cam., 



[p. 442. 



328. Hymenobosmina spinipes, Cam. 



Bosmina spinipes, Cameron,* Manch. Mem. 1899, p. 121, pi. iii, 



fig. 13($). 



$ . Head : face, clypeus and external orbits with dense silvery 

 pubescence ; palpi, and base of mandibles broadly, stramineous ; 

 vertex closely, the frons more strongly, punctate and centrally 

 carinate. Antennae black, with the pubescence long and pale on 

 the red scape, short and black on the flagellum. Thorax immacu- 

 ate; mesonotum closely punctate, with dense black pilosity ; 



