THE CANADIAN ENTOMOLOGIST. 205 



A NEW PAL.EARCTIC GERAJSTOMYIA (TIPULID.^, 

 DIPTERA). 



BY C. P. ALEXANDER AND M. D. LEONARD, ITHACA, N. Y.^ 



The following species is described from niiterial sent to the authors 

 by Prof Dr. M. Bezzi. It was received by him from a correspondent in 

 He Djerba, off the northern coast of Africa. Our thanks are due to Dr. 

 Bezzi, and we take pleasure in dedicating this interesting species to him. 



Gertviemyia bezzii, sp. n. 



Male (alcoholic). Colour light yellow ; proboscis vvith a brown sub- 

 apical band ; thoracic dorsum with four longitudinal brown stripes ; 

 pleurae with a few dark brown spots. Wings hyaline with four rather 

 indistinct spots. 



Length, 7.2-7 5 mm.; wing, 6 3-6.4 mm.; head, total, 2.2 mm.; 

 thorax, 1.7 mm.; hind femora, 5 mm. 



Head : Proboscis light yellow, vvith a conspicuous, brown, subapical 

 band ; palpi brown ; antennœ yellow. Front, vertex and occiput light 

 brownish yellow. 



Thorax: Ground colour )ellow ; dorsum with two median and two 

 lateral brown stripes. Mesothoracic praescutum pale yellow, v/ith two 

 brown longitudinal bands^ a little wider than the dividing median line, 

 these bands darker on the outer margin; they begin near the cephalic 

 margin of the sclerite and continue caudad.. fading out at about two-thirds 

 the length of the sclerite. Just cephalad of the end of the median stripes 

 begin the dark brown lateral stripes ; on the praescutum they are arcuated, 

 continuing back onto the scutum, where they are also broader ; end of 

 the scutellum darker brown on either side of the pale median line ; caudal 

 edge of the postnotum dark brown. Pleurœ concolorous with the dorsum, 

 lateral margin of the mesothoracic praescutum dark brownish black, most 

 intense on the margin of the sclerite; an intense brown semilunar mark 

 on the pronotal pleurae, midway between the anterior coxse and the dark 

 mark on the edge of the mesothoracic prasscutum ; an irregular, interroga- 

 tion-like mark below the wing root ; ventral portion of the mesothoracic 

 episternum and sternum brown. Haltères light yellow, knob clear yellow. 

 Legs light brownish yellow, tips of the segments not appreciably darker. 



Abdomen yellow, with a brown mark on the ventral edge of the 

 tergites, the first elongate, expanded over two segments ; behind this there 



I. Contribution from the Entomological Laboratory of Cornell University. 



July, 1912 



