TENTHREDINID.E. TARPA. 95 



what ovate, shuttle-shaped, with the ends truncate, and receiving 2 recurrent 

 nervures ; 3rd extending to the apex : abdomen long and somewhat cylin- 

 drical : legs slender, simple, with 2 minute sharp spurs at the apex of the 

 tibife. 



This genus not only differs in general habit from Emphytus, but 

 the structure of the wings is totally dissimilar — somewhat resembling 

 that of Dolerus and Dosytheus, inasmuch as the 1st submarginal 

 areolet is elongated, the 2nd small ; but the great diiference in the 

 antennae, form of thorax, abdomen, and legs, in addition to the total 

 diversity of colour, sufficiently point out its distinction from those 

 genera and from Emphytus, with which it has been improperly asso- 

 ciated. 



Sp. 1 . ochroleucus. Albido-luteuS) pedibus pallidioribus capite pleureque strigis 

 2-bus atris, thorace lineis 2-bus anticis, abdominis segmentorumqite basifuscis. 

 (Long. Corp. 2^ lin. ; Exp. Alar. ^ lin.) 



N. G. ochroleucus. Steph. Caial. 339. No. 3962.— Mel. ochroleucus. Sieph. 

 Nomen. 2d edit. col. 129. 



Yellowish-white: head deep shining black; labrum and antennae ochreous ; 

 thorax with 2 abbreviated fuscous streaks in front, and 2 deep black streaks 

 on the sides beneath the wings ; abdomen paler than the thorax, the base 

 of each segment, excepting the terminal one, with a broad fuscous fascia ; 

 legs entirely pale ochreous-white; wings hyaline, pale ochreous, with the 

 nervures and stigma yellowish. 

 Taken in Devonshire, apparently rare, I believe in June. 



§ 7. AnienncE composed of numerous articulations, moderate or elongated : body 



moderate, depressed : wings with 2 marginal and 4 submarginal areolets : 



posterior tibicB with spurs in the middle. 



Genus XXVII.— TARPA, Fabricius. 



Antenna pectinated or serrated, the 2 basal joints straight, the remainder 

 obliquely inserted; 1st and 3rd joints elongate, the 2nd very short, the rest 

 moderate : mandibles large, deeply bidentate at the apex : labrum elongate, 

 its joa/pi with the joints equal: Aeac? suborbiculate, as large as the thorax : 

 ei/es moderate : ocelli 3 : wings short, broad, rounded at the apex ; anterior 

 with 2 marginal areolets, the basal one semicircular, the other thrice as 

 large ; and 4 submarginal ones, the 1st small, the 2 next nearly equal to each 

 other, the 2nd receiving 1 recurrent nervure, the 3rd receiving 2, the 4th not 

 extending to the apex : legs slender ; the 4 posterior tibicB with 2 spurs at 

 the apex, and 2 in the middle, on the inner edge. 

 Tarpa differs, not only in general habit, from Lyda, but in several 



minor variations of structure, of which one of the most conspicuous 



