Hood — New Genera and Species of N. A. Tliysanoptera. 63 



of which, through Mr. Hart's generosity, are in my private 

 collection. In a previous paper, published in these Proceed- 

 ings, two of the new species were described and assigned to a 

 genus previously unknown from the United States; one of these 

 was named Diceratothrips karti in recognition of its collector. 



Mrs. E. C. Green (nee L. M. Hart) is to be thanked for her 

 careful outlines and first washes of the two species illustrated 

 in the accompanying plate.* And, as usual, Mr. R. S. Bagnall, 

 the English Thysanopterist, has aided in comparing certain 

 species with the types of Old World genera. 



Suborder TEREBRANTIA Haliday. 



Family .EOLOTHRIPTDiE Hamdav. 



StomatothrIps gen. now 

 ( (rr6fj.a, mouth; Qp^, a wood worm. ) 



Head short, distinctly wider than long, broadly received into prothorax, 

 and produced between the non-projecting eyes. Antennae nine-segmented , 

 moderately slender, inserted very close together; segments 7-0 more or 

 less compactly united. Maxillary palpi clearly eight-segmented; labial 

 palpi five-segmented, the basal segment very short. Prothorax wider 

 than long, slightly longer than head; posterior margin without strong 

 spines. Fore tibiae unarmed ;t second fore tarsal segment with the usual 

 book-like appendage. Fore wings expanded apically, where they are 

 twice as broad as near base. Abdomen very broad at segments 5 and 6, 

 snbpetiolate; ninth abdominal segment of male not prolonged at the 

 posterior angles into hooked, clasping organs. 



T;ipe: Stomatothrips flnvus sp. now 



This genus resembles Orothrips and Erythrothrips, Moulton, in the in- 

 creased number of segments of the maxillary and labial palpi; and in 

 that the ninth abdominal segment of the male is simple. From both it, 

 differs in the exact number of palpal segments and in having wings which 

 are expanded apically; furthermore, the antennal segments are free in 

 Orothrips, and in Erythrothrips the head is elongate and of different 

 structure anteriorly. 



That such genera as Orothrips, Erythrothrips, and Stomatothrips have 

 been found only in North America i< of especial interest because of the 



•The true light and shade relation has i 11 lost to a great degree in the reproduc- 

 tion of the original drawings, due to the use of an inferior quality of < ihinese white. 



f Moulton states thai Orothrips has "all tibiae armed" (Tech. Ser.i'2,Part III, 

 Bur. Ent., I", s. Dept. Agr., p. 45) but his figures contradict this statement (PI. I, tigs. 1 

 and i). For a drawing of an armed tibia see Uzel, " Monographie der Ordnung Thy- 

 sanoptera," Tab. V. fiK. 38. 



X Moulton. in his generic description of Erythrothrips (Tech. Ser. 21, Bur. Ent., U.S. 

 Dept. Asrr.. p. 35), gives the number of segments in the labial palpi as three; but 

 twenty-two lines below, in his description of the type species, states, '* labial palpi four 

 segmented." 



