CHOBI80PS. ALLOGNOSTA. 93 



Life-history. The metamorphoses of C. tibialis have been well 

 described by Handlirsch.* 



02. Chorisops tibialis, %. 



Beris tibialis, Meigen, Syst. Beschr. ii, p. 3, pi. xii, fig. 8 (1820). 

 Chorisops tibialis, Brunetti, Rec. Ind. Mus. vii, p. 456 (1912). 

 Actina hyaUventris, A. Costa, II Giamb. Vico Napoli, ii, p. 455 (1857). 



d 1 $ . Head : irons shining in tf , blue-black or dark green, one- 

 eighth width of head at vertex, narrowing to half that width on 

 lower half; in $ about one-fifth of head at vertex, slightly narrow- 

 ing downwards, greenish black; vertex with black hairs, frons 

 with pale pubescence ; face shining white ; proboscis dull orange, 

 palpi yellowish, porrect, distinct; eyes bare, facets all equal. 

 Antennas rather longer than head (longer still in $ ), brownish 

 black, pale below towards base, variable ; 3rd joint 8-annulated. 

 Thorax and scutellum brilliant shining green, finely punctate, 

 with fine yellow pubescence ; pleurae with pale pubescence, middle 

 part of mesopleura bare ; scutellar spines yellow, with a long apical 

 hair (besides other hairs); humeri yellowish in $. Abdomen 

 black, moderately shining, more or Jess yellowish on the disc 

 (especially in the $ ), including generally the greater part of the 

 3rd and 4th segments ; pubescence short and dark ; pale yellow at 

 sides down to 4th segment ; venter more yellowish than dorsum ; 

 genitalia very distinct, and protruding, connected with last abdo- 

 minal segment by a short neck. Legs yellow to dull orange : tarsi 

 blackish from tip of 1st joint ; hind femora brownish yellow, 

 variable ; hind tibiae mainly blackish brown, considerably incras- 

 sated after the base ; hind tarsi rather short, 1st joint incrassate, 

 as long as remaining joints together ; pubescence of legs pale 

 yellow ; 5 with legs paler than in the d . Wings with a faint 

 brown suffusion ; stigma large, dark brown, sometimes paler in 

 2 ; halteres yellow, with large knobs. 



Length, 6 mm. 



The above description is abridged from Verrall.t 



Binsar, Kuinaon Distr., W. Himalayas, 28, v. 1912 (Dr. A. D. 

 Itnms). 



Genus ALLOGNOSTA, 0. S. 



Alloynosta, Osteu-Sacken, Berl. Ent. Zeits. xxvii, p. 297 (1883). 

 Metoponia, Loew (nee Macq.), Dipt.-Faun. Siidafr. i, p. 1 (1860). 



GENOTYPE, Beris fuscitarsis, Say ; by designation of Coquillett, 

 1910. 



cJ $ . Head transverse, rather flattened, as broad as thorax ; 

 eyes contiguous in d* ; frons in $ rather prominent, convex (in 

 assar.iensis), between one-third and one-fourth width of head. 

 Antennas set at middle of head in profile ; scapal joints subequal, 



* Yerh.iool.-bot. Ges. Wieu, xxxiii, p. 243 (1883). 

 t British Flies, Stratiomyidte, &c., v, p. 214 (1909). 



