PARACOROTOCA AKERMANI (wARREN). 351 



muscles are present, and the structure is doubtless eversible 

 through the anus. The cells appear to be glandular in 

 nature, and the cytoplasm has a very special and charac- 

 teristic aspect (PI. XX, figs. 90, 91, gl. ep.). Function unknown. 



VI. COMPARISON OF LARYA AND PARACOROTOCA 



IMAGO. 



The more important resemblances or differences between 

 this larva and Paracorotoca imago may be briefly sum- 

 marised : 



(1) The larva is an undoubted Staphylinid. 



(2) The larva has 10 abdominal segments, and with 

 Verhoeff's numbering of the abdominal terga in a typical 

 imago beetle we also find 10 segments in Paracorotoca 

 imago. 



(3) Exceptional size of palpiger for maxillary palp in both. 



(4) Labial palps 1-jointed in both. 



(5) No salivary glands opening into gut found in either. 



(6) Sucking pharynx in both. 



(7) CEsophagus narrow and short in larva, longer and 

 expanding in the imago. 



(8) Mesenteron of great size in both and carrying no 

 ca3cal diverticula in either. 



(9) In larva the ileum is relatively longer and colon shorter 

 than in imago ; 4 Malpighian tubes in larva, only 2 found in 

 imago. 



(10) Fat-tissue of a different type in the larva and in the 

 imago. In the former the fat-tissue is exceedingly abundant, 

 and it occupies the greater part of the space between the 

 gut-wall and the body-wall. The cells are of great size, tend 

 to be arranged in large lobules, and are filled with large 

 globules of fat substance. In the imago the fat-tissue is 

 relatively less abundant ; it occurs in the form of sheets, and 

 the cells are much smaller, stain more readily, and carry the 

 fat-substance in vacuoles of various shapes and sizes. 



(11) In the larva between abdominal segments VIII and 

 IX there is a median dorsal, intersegmental, hypodermal 



