8 THE ENTOMOLOGIST'S RECORD. 



a row of bristles twice as long again ; the row of plates are wanting in 

 the basal quarter ; the exterior joint of the pincers without plates, 

 bristles, or an apical tooth. Size, 3-5mm. 



This species is near to G. pilosus, Thorns., but the latter has the 

 whole thorax, according to Thomson, covered with upstanding white 

 hair. The genus Gonatopus has six representatives in England, which 

 may be grouped in the following manner : — 



1. Second thoracic node with upstanding hair; vertex 



slightly excavate ... ... ... ... ... ... 2. 



Second thoracic node glabrous ; vertex strongly excavate 3. 



2. Exterior joint of the pincers armed, underneath, with six 



to eight plates, thickened, and with a subapical tooth ; 

 interior joint bent before the extremity, with plates in 

 rows. Myrmecophilous according to Bignell (accord- 

 ing to me, p. 91, subpilosus, p. 500, subatriatus) ... striatus, Kieff. 

 Exterior joint of the pincers unarmed, without jilates, 

 and without a subapical tooth ; interior joint bent be- 

 fore the extremity, with one row of plates touching each 

 other, and one row of bristles much longer. Myrmeco- 

 philous ... ... ... ... ... ... ... sociabilis, Kieff. 



3. Exterior joint of the pincers unarmed ; interior joint 



strongly bent before the extremity, with one row of 

 plates and one row of bristles ... ... ... ... -1. 



Exterior joint of the pincers with one row of thickened 

 plates and with one tooth before the extremity ; interior 

 joint not bent before the extremity, with two rows of 

 plates ... ... ... ... ... ... ... 5. 



4. Thorax entirely black ; exterior joint of the pincers 



armed underneath, in the middle, with bristles ... distinguendus, Kieff. 



itris, Marsh, not Dalm.) 

 Thorax red and black ; exterior joint without bristles ... marshalli, Kieff. 



(lunatus, Marsh, not King.) 



5. Interior joint of the pincers with two rows of very 



thick plates, each row containing only five plates ... b'n-olor, Hal. 



(pedestris, Marsh, pt., not Dalm.) 

 Interior joint of the pincers with two rows of compact 

 plates touching each other ... ... ... ... distinctus, Kieff. 



i pedestris, Marsh, pt., not Dalm.) 



[The species here described was taken by me on the Camber sandhills, 

 in August, 1902, running among a number of Tetramorium caespitum., to 

 which ant it bears a strong superficial resemblance. G. striata*, 

 Kieffer, was taken by Bignell in a nest of Formica fusca, where I know 

 not. Mr. Chitty tells me that Mr. Morley has taken a specimen of 

 the new species at Lymington. All the species of Gonatopus are very 

 like ants ; they are parasitic, I am told, on small Homoptera, but they 

 belong to the section of species wbich mimic ants, and obtain protec- 

 tion from their resemblance to them, living in or near ants' nests in 

 order to obtain their prey. To this section belong some of the bugs, 

 spiders, etc. — H. St. J. K. D.] 



Notes on Coleopliorids — Coleophora argentula. 



By H. J. TUKNER, F.E.S. 

 On September 9th, 1904, I went down to Fobbing, on the Essex 

 marshes, to obtain larva? of various species of Coleophorids, which 

 I knew abounded in the neighbouring saltings. There, I found in 

 numbers, the cases of C. argentula, on the heads of matured seeds of 

 the common yarrow (Achillea millefolium). The cases were never 



