BLISTER BEETLES IN KANSAS. 



assuming a horseshoe shape when at rest ; head horny, yellowish, with front 

 almost vertical ; mandibles brown, curved ; antenna? situated above the outer 

 edges of the bases of the mandibles, apparently three-jointed, with two fleshy 

 projections on the distal end of the third segment; first and second antennal 

 segments with basal rings of brown and third segment brown for almost its 

 entire length ; eyes minute black spots above the bases of the antennae ; sutures 

 extending diagonally backward from the bases of the antennae, meeting at the 

 median line above the middle of the front; labrum separated from the front 

 by a brown suture ; legs fleshy, jointed, the distal ends thickly studded with 

 stiff brown spines ; spiracles on second body segment and on fourth to eleventh, 

 inclusive. 



Pupa. 



Length, about 17 mm.; width, about 7 mm. (measured from tip to tip trans- 

 versely extended femora) ; color yellowish white with translucent appendages; 

 head appressed on prothorax until front is almost parallel with body; femur 

 and tibia of each leg folded together and extending forward, upward, and out- 

 ward ; tarsi extending posteriorly on the venter ; antennae extending pos- 

 teriorly dorsal to the anterior and middle legs; posterior margins of pro- 

 thorax and abdominal segments bearing stiff, curved spines. 



Macrobasis unicolor Kirby. 

 Adult. 



Specimens of Macrobasis unicolor collected at Garden City, Ivans., averaged 

 about 13.6 mm. long and 3.4 mm. wide. Blatchley gives the limits of their 

 variation in length as 8 to 15 mm. It is the slen- 

 derest of our species (fig. 9) and the sides are almost 

 parallel ; color ashy gray, sometimes with a yellow- 

 ish cast, but more uniform than in any other species 

 collected at Garden City, except the black ones. 



Egg. 



The eggs were not secured nor were the growing 

 stages of the larvae identified. 



COARCTATE LARVA. 



Five specimens vary in length from 10 to 12 



mm., and in width from 4.5 to 5.5 mm. They are 



j. , j , _c ii • i -U i t F IG - 9- — The ash-gray blis- 



rather slender and of a yellowish brown color. In ^ beetle {Macrol)asis 



other ways they agree with the coarctate larvae of unicolor) : Female beetle. 



Macrobasis immaculata. Enlarged. (Chittenden.) 



Third Larva. 



Smaller and more slender than the corresponding stage in M. immaculata, 

 but otherwise similar thereto. 



Pupa. 



The only specimen measured was 10 mm. long by 3 mm. wide. Though 

 smaller and more slender it was otherwise similar to the pupa of M. immacu- 

 lata. 



48562°— 21 2 



