5G 'Trans. Acad, of SI. Louis 



exception. Witli the dock thus }i;om\ tlio ])eotlo.s had mi- 

 prateil to tlie nearby i)i,i^-weed, milk-weed and jx'pjxT- 

 ^'rass, l)ut many still cluni^' tenaceoiisly to the mid-ri))s of 

 their favorite, the dock. 



A few hatches of e^<i^s laid in the laboratory liatched in 

 six days. The pnj)ae transformed in the earth IV2 

 inches below the surface, in a little smootldy-lined bur- 

 row without an openiuir. 



Trirhabda canadensis Kirliy. [E. A. Scliwarz]. These 

 beetles were abundant on the resin-weeds at Wickes, 

 June 16, 1917. TJie fact that ])ortions had been eaten 

 from the weeds in so many places led us to suspect that 

 the adults fed on this i)lant. 



Diahrotica Vl-punctata x /). vittata. Between Sep- 

 tember 4 and 14, 1912, seven cases of matins: between the 

 two species were observed in the pumpkin-l)lossoms. In 

 every case, the male was the striped beetle, D. rittata, 

 and the female the spotted variety, I). ]2-punctaf(i. One 

 j)air was observed in copulo for one-iialf hour continu- 

 ously; they were then disturbe<l when bein,<x placed in the 

 bottle, but later in the day they re-united for another 

 hour and a (juarter. 



Ilallica hlmar(]inata Say. [E. A. Scliwarz]. Feeding 

 on the leaves of a willow sprout Octolx'r .'>, 1917. 



Blcpharida rhois Frost. [11. S. Barber]. This beetle 

 was found dead in a sumac stem in January. From the 

 position it was evident that it had cre])t into tlie jiole for 

 shelter and died. 



Sijnchroa punctata Newm. \\\. S. Barber]. These 

 pui)ae were taken from under the bark of a rotten \o<r on 

 May 11. 'i'he adults emerged the next day. 



Nacerdcs inclanura Linn. [E. A. Scliwarz]. Many 

 were seen in St. Louis in the first week of June, 1915. 



Ncmojinatha lutca. [E. A. Scliwarz]. These wen^ 

 a])undant in July on the blossoms of the sunflower, and 

 seklom (lew from plant to ])lant. They could easily be 

 picked up from the flower; they practiced no <lropping 



