462 



Commonly known as the Grass thrips Anaphothrips striatùs, is 

 one of Ihe besl known pests of North America, and, because of its 

 wide distribution if lias been referred to under several nanties, as 

 will be seen by Uie long lisl of références given in Hind's Mono- 

 graph on the Thysanoptera of^ortb America. On studying P/Hinds 

 excellent mémoire on the Grass thrips (1), I came to the conclusion 

 that A. striatùs was the saine insect as our common European form 

 A. obscurus, and I hâve been ahle to substantiate that opinion by 

 comparing Nearclic spécimens kindly given me by M 1 ' Douglas 

 Hood of Illinois with spécimens collected by myself in Great Bri- 

 tain, Belgium, Norway and Denmark. 



The name Anaphothrips striatùs and ail its synonyms mnst there- 

 fore be sunk as synonyms of A. obscurus. 



Sub-order TTJBTJLIFERA 



RHAPTOTHRIPS PEGULIARIS Crawford, a larval Thysanopteron. 



The insect which Mr. Crawford very clearly describes and 

 figures in the Pomona Journal of Entomology (Vol. I, n° 4, pp. 116- 

 119, fîg. 52a- 52h) is undoubtedly a larval form. The seven jointed 

 antennee, the distinctive form of head. the mouth parts, the dorsal 

 prothoracic plates, and the irregular setigerous plates on the 

 abdomen, the specialized hairs or elongated bristles at the tip of 

 each tibia, the nnformed foot, the form of the ninth abdominal seg- 

 ment, ail point to the fact that the insect is larval, most probably 

 belonging, if I may venture an opinion, to a species of Tdolothrips, 

 Dicaiothrips or allied genus. 1 do not know as to whetherany black 

 thrips' larvse hâve been previously described, but I can well under- 

 stand how Mr. Crawford has fallen into the error of regarding bis 

 solitary spécimen as an imagine as I myself had partial ly described 

 a similar larval form from the Malay Archipelago as new before 

 l recognised that it was only a larva. Since then I bave received 

 larvse of a species of Idolo thrips, from the Seychelle Islands, which 

 closely resemble Crawford's form. 



ANTHOTHRIPS FASCIATUS (Butler). 



Aptinothrips fasciatus Butler, Ann. Mag. Nat. llist., n° 101, p. il2, 

 1876. 

 Butler describes his Aptinopthrips fasciatus as follows : 

 « Blackish pieeous, glabrous; wings hyaline; bases of antennal 



joints, eyes, ocelli, and iîve broad abdominal bam's crystalline 



(1) « The Grass Thrips », Mass. Agric. Coll., 1900. 





