^farch, i9::o.] DiCKERSON & WeISS I EVENING PrIMROSE InSECTS. 57 



amined with transmitted light the egg is liquid yellow or amber 

 opaque centrally; this color persists until hatching. The pruinose 

 coating is easily removed by gently rolling the eggs between the 

 fingers. The micropyle is not conspicuous" (Girault). 



Fiill-Grozvn Larva. — Length 7 to 8 mm. Width 2.2 mm. Typical 

 curculio-shaped, creamy white ; head small, brownish, mouth parts 

 darker ; body strongly convex above, somewhat flattened beneath ; 

 skin transversely wrinkled; apodous; hairs on head and body short, 

 sparse; thoracic ambulatory tubercles present. 



Pupa. — Length 6.5 mm. Width 2.1 mm. Creamy white; head 

 and thorax bearing a few hairs with pronounced tuberculate bases; 

 dorsal surface of each abdominal segment bears a transverse row of 

 few hairs; tuberculate bases of hairs l)ecome larger toward anal 

 segment ; body terminated by two parallel spines. 



Adult. — Tyloderma foz'colato. The following is the original de- 

 scription: "Body black, with dilated punctures; head with dense, 

 small punctures, a frontal indentation, and a yellow spot ; rostrum 

 robust, moderately arcuated, punctured like the head; antennae 

 jointed; first joint hardly reaching the eyes; thorax with three small" 

 yellowish spots and one before; elytra with regular series of large 

 quadrate punctures; several small yellowish spots and a large, irregu- 

 lar one behind; feet unarmed. Length less than one fiftli of an 

 inch." 



The adults vary much in size and sculpture, the punctures of the 

 elytra sometimes being in regular rows and again very unevenly 

 distributed. 



As has been indicated the development of the insect is very ir- 

 regular, oviposition beginning in May and continuing well through 

 July, while pupae were noted in some stems on September 11. The 

 irregularity of development is well shown by the records obtained 

 from some stems examined on June 29. which are as follows : At 

 Woodstown, N. J., 5 small larva?. 8 medium-sized larvse, 8 large 

 larvie, i parasitic cocoon were found. At Springfield, N. J., on 

 August 18 the following record was obtained: 4 small larvas, 2 

 medium-sized larvae, 17 large larvae, 10 pupas, 5 adults, 5 exit holes 

 from which adults had emerged, 4 parasitic larvae, 4 parasitic pupae. 

 It is also worth noting that no apparent injury is done to the prim- 

 roses by the beetles even when the infestation is severe. Infested 

 plants grow and flower more or less like uninfested ones. 



