42 TABANIDjE. 



long, linear, depressed. Legs of equal length ; tibias compressed, not 

 thicker than the femora. 



Male. Mouth horizontal. Labrum lanceolate, hollow. Palpi very 

 hairy ; first joint clavate ; second nearly oval, much broader than the 

 first. First joint of the antennas very much incrassated. 



Fern. Head with two black spots and a black dot, forming a tri- 

 angle on the crown. Mouth perpendicular. Labrum rather broad and 

 stout. Mandibles lanceolate, as long as the labrum, seated on the 

 under base of the labium. Palpi pubescent ; first joint short ; second 

 long, conical, slightly curved, not broader than the first. First joint 

 of the antennas oval, scarcely stouter than the third. 



These flies are much more abundant than the Ta&ani; their 

 flight is silent. 



1. pluvialis, L. s. n. ii. 1001. 16 (1763) ; Dg. ; Fb. ; Shr. ; Gm. ; 

 Gfr.; LI. ; Pz. ; Mg. ; Fin. ; Mq. ; Ztt. kyetomantis, Shr. equorum, 

 Fb. ; Mg. tenuicornis, Mq. italica, Mg. ; Gt. ! b. e. longicornis, Mq. 

 grandis, Mgrle. ; Mq. Capite cano, antennis nigris, articulo tertio 

 basi ferrugineo, alis cinereis confertim albido-subocellatis, tibiis poste- 

 rioribus fulvis nigro-bicinctis, tibiis anticis et tarsis posterioribus basi 

 fulvis. Mas. Niger, abdominis lateribus nonnunquam fulvis. Fcem. 

 Fuscus, thorace cinereo-trivittato, abdomine maculis cinereis trivit- 

 tato, segmentorum marginibus posticis canis. Long. 3-^-5 ; alar. 

 7-10 lin. 



Head hoary. Eyes green, with 3 or 4 crimson bands. Antennas 

 black ; third joint more or less ferruginous towards the base, sometimes 

 quite black. Wings dark grey, with numerous whitish curved lines 

 and imperfect circlets. Halteres tawny. Legs black ; fore tibiae and 

 tarsi tawny at the base ; posterior tibias tawny, with 2 black bands. 

 Male. Black. Head clothed in front with pale yellow hairs. Sides 

 of the abdomen sometimes tawny. Fern. Brown. Head clothed in 

 front with white hairs, black and shining about the base of the an- 

 tennas, above which there are 2 dark brown spots. Thorax with 3 grey 

 stripes. Abdomen with 3 rows of grey spots ; hind borders of the 

 segments hoary. 



Generally distributed, and excessively abundant in the summer; 

 the warmth of a hothouse will develope the fly in the beginning of 

 March. (E. S. I.) 



Genus III. CHRYSOPS. 



CHRYSOPS, Mg. kl. (1804); Fb. s. a.; Fin. ; Mq. ; Ztt. Tabanm p., 



L. ; Fb. ; Pz. 

 Corpus mediocre, pubescens, oblongum, sat latum. Color obscurus ; 



