250 CONNECTICUT GEOL. AND NAT. HIST. SURVEY [Bull. 



Measurements : total length, 24-27 mm. ; length of abdomen, 

 15 mm. ; width of abdomen, 7.5-9 mm. ; length of the hind femora, 

 6 mm. ; length of the median lobe of the labium, 4.5-5 mm. 



Adult, male. — Color brown and buff or yellow. 



Head : labium buff, labrum black or brown, clypeus and front 

 dark brown, the vertex almost black, and projecting over the 

 median ocellus in two distinct lobes ; front wrinkled ; occiput and 

 postgenae dark brown, the postgenae with 2 to 3 yellow spots on 

 each side behind the caudal margin of the compound eyes. 



Thorax: dark brown, the dorsum somewhat lighter; prothorax 

 brown, the caudal margin of the pronotum entire and with but 

 few long hairs ; legs dark brown to almost black, the femora each 

 with ventro-lateral rows of heavy setae, flat beneath, and usually 

 with a single dorsal carina ; tarsal claws with a large ventral tooth 

 placed considerably beyond the middle ; wings with a basal elon- 

 gated brown spot extending beyond the triangle, a nodal spot and 

 a brown apex ; anal angle and somewhat indefinite area between 

 each brown spot, white ; the white areas may, however, be entirely 

 wanting ; veins black ; meso- and metathorax much darker on the 

 sides and with two yellow or grayish stripes (which may be 

 obscured in older specimens), one of which extends from the base 

 of the hind wing to caudal margin of the mesokatepi sternum ; 

 the other lies just above the lateral carina on the metepimerum; 

 thoracic venter brown. 



Abdomen : not compressed, gradually narrowed behind the third 

 segment, with two buff or yellow stripes on terga above each 

 lateral carina, extending from i to 8; yellow spots also on the 

 terga below the lateral carinae on segments 2 to 8; remainder of 

 the terga and venter dark brown to black ; anal appendages black, 

 the ventral surface of the superiors with about 12 small teeth; 

 hamules (Fig. 63, No. 11) of the second segment with much 

 reduced lateral lobes, but with large conspicuous mesal hooks ; no 

 ventral hooks on the first segment ; the entire abdomen becomes 

 bluish pollinose, obscuring the yellow marks. 



Female. — The brown spots on the wing are usually smaller, 

 but otherwise there is no important difference between the sexes ; 

 female appendages shown in Fig. 63, No. 3 ; lateral margins of 

 the eighth terga produced ventrad. 



Measurements : total length, male 55-57, female 47 mm. ; length 

 of abdomen, male 32-33, female 27-29 mm. ; length of hind wing, 

 male 41-44, female 36-39 mm.; width of hind wing, male 12-13, 

 female 11 mm. ; length of stigma, male and female, 5-5.5 mm. 



The female is very similar to the female of P. lydia, but the 

 structure of the venter of segments 8 and 9 is considerably 

 different (Fig. 63, Nos. 2, 3), and the body is longer. Both L. 

 pulchella and P. lydia become pollinose with age so that color 

 characters of the body are not distinct. 



