ASTIP1IB.OMMA. A5ESOCHORUS. 517 



apex of hind trochauters, of their tibiae and tarsal joints, faintlv 

 infuscate; antennse slender, filiform and nearly as long as the 

 body ; two basal abdominal segments very strongly aciculate, 

 the first somewhat strongly dilated, with the spiracles distinctly 

 bevoad its centre ; tei'ebra not extending beyond the anus, which 

 is compressed from the base of the fourth segment. Stigma sub- 

 infuscate ; areolet small, distinct, subcircular and elongately 

 petiolate, emitting the recurrent nervure from near its apex ; 

 radius angled above the areolet, short and hardly extending 

 further than the broadly curved second recurrent nervure ; 

 internal cubital uervure evenly curved throughout ; basal nervure 

 continuous ; lower wings with the recurrent as long as the basal 

 abscissa of the radius, and the nervellus distinctly intercepted, 

 though less distinctly geniculate. at its lower third. 



Lenc/th 3 millim. 



CEYLON: Peradeniya, v. 09 (E. E. Green'). 



Type in the author's. collection. 



The elongately petiolate areolet and very small size distinguish 

 this insect from any of the Palsearctic species, though perhaps it 

 may be placed near A. varipes, Holmg. (cf. Thorns. I.e. p. 329). 



I have seen two specimens, one of which was taken by sweeping 

 Crotaluria striata. 



Genus MESOCHORUS, Grav. 



Mesochoms, Gravenhorst, Ichn. Europ. ii (1829), p. 960. 



GENOTYPE, M. splendidulits, Grav. 



A genus of fragile and usually very small insects, for the most 

 part of a luteous or flavescent coloration and often more or less 

 indefinitely marked with black, always strongly nitidulous, with 

 the abdomen strongly convex rather than laterally compressed ; 

 the females always have the terebra exserted and the males their 

 anal styles very prominent, rendering them liable to be mistaken 

 for the opposite sex. From the allied genera the position of the 

 junction between the anal nervure and first recurrent of the front 

 wing will serve to distinguish them in the present state of our 

 knowledge. 



Range. North America, Europe, Sikkim, Assam, Burma. 



Table of Species. 



1 (2) Areolet sessile ; basal nervure post- 



f urcal faciulis, Bridg., p. 518. 



2 (1) Areolet petiolate ; basal nervure 



continuous through the median. 



3 (4) Stigma unicolorous stramineous; 



thorax entirely pale frag*K, sp. "-, P- 5 19- 



4 (3) Stigma hyaline 'at both extremities; [p. ol^. 



thorax partly black claristigmaticus, sp. n., 



