135 



sanguineous. Genital segments pale. Tegmina hyaline, veins 

 whitish ; second longitudinal apical cell smoky, apices of apical 

 veins infuscate, also a short fuscous line near apex of commis- 

 sure. Keels of frons forked about the middle of the eyes. 



Male: pygophor beneath very deeply emarginate basally. Anal 

 tube with a strong spine on each side overlooking the genital 

 tube. Genital style elongate reaching from end to end. The 

 oedeagus is remarkably long and is subhorizontal. 



Length 4/6 mill. 



Hab. China, Wei Chou (Sept.). 



I have great pleasure in naming this species after its dis- 

 coverer. 



Perkinsiella. 



Perkinsiclla Kirkaldy 1903 Entom. XXXVI, 179 and 1906 

 Bull. H. S. P. A. Ent. I, 404. 



F/iacalastor Kirkaldy op. c, 408. (part) 



A derivative of Dicranotropis from which (& Pcrcgri)iiis) it 

 differs by the antennae being flattened and dilated, the apical 

 margin of the first segment being much broader than the base ; 

 the genal and frontal keels meet acutely apically. The venation, 

 and the form of the head and pronotum are similar to those of 

 Dicranotropis. In the male the ventral margin of the pygophor 

 has two hooks or spines of varying length and form, according 

 to the species. The males of the six species known to me are 

 easily distinguishable by the form of the pygophor, otherwise 

 the species may be separated as follows: (*) 



I Frons with a more or less uniform ground colour, with 

 transverse pale dots, &c (2 ) 



1 a Frons basally brownish, apically whitish, the two areas well 



contrasted, the former with pale dots (3 ) 



2 Frons pale brownish, with whitish dots basally and apically 



5 vastatrix 



2?, Frons piceous with brownish-yellow transverse dots, &c. 

 I pseudouiaidis 



3 Males (4) 



3a Females ( 7 ) 



* Perhinitiella is also closfly related to the Aiiieriean Stohaera, but in the latter the 

 head is distinctly narrower than the iiroiiotmu and the pygophor has no spines on the 

 ventral margin in the male. 



