316 TIPULID^E. 



being fairly long and slightly notched on the upperside just 

 beyond the base. In some specimens the flagellar joints are 

 shorter, and when this is the case they are generally mainly 

 yellow, with a narrow black base ; occasional intermediate forms, 

 both in the matter of length of the joint and colour, prove that 

 the differences are not specific. Proboscis brownish. Palpi more 

 or less brown, first three joints subequal in length, 3rd the shortest; 

 2nd and 3rd stouter, 4th thin, twice the length of 2nd ; all the 

 joints moderately pubescent. Eyes black ; frons at narrowest 

 part barely one-third of head ; back of head concolorous, with a 

 few hairs, especially just behind, but not contiguous to the eyes, 

 also on lower part. Thorax mainly yellowish grey, varying to 

 ash-grey, often with a slight greenish tinge ; dorsum with three 

 stripes on anterior part, the middle one divided behind, reaching 

 to the suture, and with a darker middle line in front ; the outer 

 stripes short, forming elongate spots, all three stripes greenish 

 grey in colour ; each post-humeral callosity bears three similarly 

 coloured spots, an inner oval one, more or less in a straight line 

 with the outer stripe in front of the suture, and two smaller ones 

 just above the base of the wings ; all the three spots being con- 

 fluent in some specimens ; shoulders more or less lighter grey, 

 sutural emargination yellowish or greyish. Scutellum yellowish 

 or yellowish grey, with a more or less distinct narrow median 

 line; metanotum yellowish grey, hinder half more ash-grey, with 

 an indistinct median line. Sides of the thorax usually concolorous, 

 but always more yellowish than the dorsum. Abdomen variable ; 

 generally in the male the first five segments yellowish or yellowish 

 brown, the remainder dull black, but the latter colour sometimes 

 encroaches on the major portion of the abdomen, leaving only one 

 or two basal segments yellow. In the female, yellowish or 

 brownish, with three dorsal black lines, but the black colour is 

 even more irregular in its extent in this sex than in the male, 

 often covering nearly all the dorsum. In both sexes a narrow 

 black line on each side of the abdomen, which is sometimes lost 

 in the nearly wholly black abdomen in certain specimens. Male 

 genitalia moderately large, concolorous, composed of an outer 

 pair of firm conical claspers, the basal joint cut away somewhat 

 on the outer side, the second joint comparatively large, with 

 pointed tip ; a narrow dorsal plate, with yellow hairs on its 

 posterior margin ; an inner pair of spoon-shaped organs bearing 

 yellow hairs. Ovipositor of female very long (3 millim.), con- 

 sisting of a long basal cylindrical piece, hard, shining, blackish 

 brown, with at each side of it a grey plate with rounded edges, 

 protruding from the last abdominal segment ; these plates do not 

 meet above or below; to the end of the basal piece is affixed a 

 pair of long, pointed, slightly arcuated lateral valves, distinctly 

 serrate on the underside ; the lower pair of valves extremely 

 short, and very liable to be overlooked unless closely searched for. 

 Legs black ; coxae, knees, femora at the base, and a broad ring 

 near the tip pale yellow. Winr/s yellowish grey, veins brown, 



